懐かしい記事を発掘したので一部修正しつつサルベージ
peppyが公開しているデフォルトスキン（https://osu.ppy.sh/forum/p/2259457）には、いくつか足りないファイルが有る
で、何となくフォーラムを見てたら足りないファイルをいろいろ見つけた（https://osu.ppy.sh/forum/p/2460251, https://osu.ppy.sh/forum/p/2322185, https://osu.ppy.sh/forum/p/2306573）ので、1つにまとめてデフォルトスキンとして存在するファイルをすべてリスト化してみた
デフォルトスキンに入ってないもの関しては知らない
ちなみにスキンのDLはこちらから→new default skin v1.1
#2013-08-13 リンク修正
Skinフォルダに入れても一応ちゃんと動きます
が、スコアバーが旧デフォルトスキンのままになります
ファイル名が違うから.iniでそこらへんを指定する必要があるっぽい？
（今気づいたけど.iniが無くても動くようになってる）
長くなるのでファイルリストは追記から
名前順にソートしてあります
ファイル名が～～～@2x.pngとなっているものはHD Skin用
ファイルとして存在はしているけどスキンとしていじれないものもあるっぽい
approachcircle.png
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beatmapimport-spinner.png
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button-left.png
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button-middle.png
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button-right.png
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checkbox-checked.png
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checkbox-unchecked.png
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circularmetre.png
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commentbox.png
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count1.png
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count2.png
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count3.png
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cursor.png
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cursormiddle.png
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cursortrail.png
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default-0.png
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default-1.png
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default-2.png
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default-3.png
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default-4.png
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default-5.png
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default-6.png
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default-7.png
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default-8.png
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default-9.png
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editor-beat-selector-buttonleft.png
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editor-beat-selector-buttonright.png
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editor-button-ff.png
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editor-button-info.png
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editor-button-jumpto.png
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editor-button-pause.png
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editor-button-play.png
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editor-button-rewind.png
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editor-button-stop.png
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editor-button-test.png
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editor-draw-beatsnap.png
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editor-draw-distsnap.png
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editor-draw-hold.png
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editor-draw-lock.png
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editor-draw-newcombo.png
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editor-draw-normal.png
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editor-draw-select.png
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editor-draw-slider.png
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editor-draw-spinner.png
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editor-menu-bg-bottom.png
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editor-menu-bg-top.png
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editor-rate-100.png
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editor-rate-25.png
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editor-rate-50.png
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editor-rate-75.png
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editor-rate-arrow.png
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editor-rate-bg.png
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editor-sound-clap.png
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editor-sound-finish.png
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editor-sound-whistle.png
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editor-timeline-left.png
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editor-timeline-minus.png
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editor-timeline-plus.png
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editor-timeline-reset.png
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editor-timeline-right.png
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epilepsy.png
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followpoint.png
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go.png
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hit0.png
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hit100.png
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hit100k.png
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hit300.png
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hit300g.png
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hit300k.png
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hit50.png
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hitcircle.png
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hitcircleoverlay.png
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hitcircleselect.png
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inputoverlay-background.png
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inputoverlay-key.png
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lighting.png
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loading-small.png
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lobby-boot.png
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lobby-crown.png
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lobby-lock.png
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lobby-unlock.png
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mania-hit0.png
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mania-hit100.png
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mania-hit200.png
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mania-hit300.png
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mania-hit300g-0.png
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mania-hit300g-1.png
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mania-hit50.png
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mania-note1.png
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mania-note1H.png
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mania-note1L-0.png
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mania-note2.png
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mania-note2H.png
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mania-noteS.png
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mania-noteSH.png
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menu-back.png
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menu-background.png
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menu-bat.png
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menu-button-back-over.png
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menu-button-back.png
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menu-button-background.png
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menu-button-edit-over.png
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menu-button-edit.png
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menu-button-exit-over.png
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menu-button-exit.png
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menu-button-freeplay-over.png
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menu-button-freeplay.png
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menu-button-multiplayer-over.png
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menu-button-multiplayer.png
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menu-button-options-over.png
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menu-button-options.png
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menu-button-play-over.png
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menu-button-play.png
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menu-button-special-over.png
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menu-button-special.png
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menu-copyright.png
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menu-np.png
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menu-osu-shockwave.png
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menu-osu.png
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menu-osudirect-over.png
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menu-osudirect.png
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menu-subscriber.png
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mode-fruits-med.png
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mode-fruits-small.png
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mode-fruits.png
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mode-mania-med.png
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mode-mania-small.png
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mode-mania.png
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mode-osu-med.png
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mode-osu-small.png
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mode-osu.png
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mode-taiko-med.png
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mode-taiko-small.png
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mode-taiko.png
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notification.png
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overlay-1x.png
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overlay-2x.png
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overlay-discussion.png
overlay-discussion2.png
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overlay-endreplay.png
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overlay-hide.png
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overlay-hidemode.png
overlay-hidemode2.png
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overlay-online.png
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overlay-show.png
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overlay-ticker.png
overlay-ticker2.png
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particle100.png
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particle300.png
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particle50.png
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pause-back.png
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pause-continue.png
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pause-replay.png
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pause-retry.png
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play-skip.png
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play-unranked.png
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play-warningarrow.png
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rank-forum.png
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rank-next.png
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rank-offline.png
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rank-online.png
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rank-prev.png
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rank-refresh.png
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ranking-A-small.png
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ranking-A.png
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ranking-accuracy.png
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ranking-B-small.png
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ranking-B.png
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ranking-background-overlay.png
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ranking-C-small.png
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ranking-C.png
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ranking-D-small.png
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ranking-D.png
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ranking-graph.png
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ranking-maxcombo.png
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ranking-panel.png
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ranking-perfect.png
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ranking-S-small.png
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ranking-S.png
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ranking-SH-small.png
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ranking-SH.png
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ranking-title.png
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ranking-X-small.png
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ranking-X.png
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ranking-XH-small.png
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ranking-XH.png
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ready.png
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reversearrow.png
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score-0.png
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score-1.png
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score-2.png
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score-3.png
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score-4.png
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score-5.png
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score-6.png
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score-7.png
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score-8.png
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score-9.png
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score-comma.png
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score-dot.png
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score-percent.png
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score-x.png
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scorebar-bg.png
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scorebar-colour.png
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scorebar-marker.png
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searching.png
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section-fail.png
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section-pass.png
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seekbar-over.png
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selection-approved.png
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selection-drop.png
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selection-latestranked.png
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selection-mod-autoplay.png
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selection-mod-doubletime.png
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selection-mod-easy.png
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selection-mod-fadein.png
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selection-mod-fadeout.png
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selection-mod-flashlight.png
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selection-mod-halftime.png
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selection-mod-hardrock.png
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selection-mod-hidden.png
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selection-mod-key4.png
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selection-mod-key5.png
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selection-mod-key6.png
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selection-mod-key7.png
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selection-mod-key8.png
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selection-mod-nightcore.png
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selection-mod-nofail.png
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selection-mod-perfect.png
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selection-mod-random.png
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selection-mod-relax.png
selection-mod-relax2.png
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selection-mod-spunout.png
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selection-mod-suddendeath.png
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selection-mode-over.png
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selection-mode.png
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selection-mods-over.png
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selection-mods.png
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selection-norecords.png
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selection-notranked.png
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selection-notsubmitted.png
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selection-options-over.png
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selection-options.png
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selection-question.png
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selection-random-over.png
selection-random.png
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selection-ranked.png
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selection-selectoptions-over.png
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selection-selectoptions.png
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selection-tab-add.png
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selection-tab-close.png
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selection-tab.png
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selection-unknown.png
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selection-update.png
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slider-followcircle.png
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sliderb0.png
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sliderb1.png
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sliderb2.png
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sliderb3.png
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sliderb4.png
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sliderb5.png
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sliderb6.png
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sliderb7.png
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sliderb8.png
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sliderb9.png
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sliderfollowcircle.png
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sliderscorepoint.png
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songselect-bottom.png
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songselect-top.png
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spinner-approachcircle.png
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spinner-bottom.png
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spinner-clear.png
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spinner-glow.png
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spinner-middle.png
spinner-middle2.png
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spinner-spin.png
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spinner-top.png
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spinnerapproachcircle.png
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star.png
star2.png
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star3.png
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taiko-roll-end.png
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taiko-roll-middle.png
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taikobigcircle.png
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taikobigcircleoverlay.png
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taikohitcircle.png
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taikohitcircleoverlay.png
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topmenu-bg.png
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topmenu-selection.png
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unpause.png
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user-bg.png
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user-border.png
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volume-bar.png
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volume-bg.png
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