Basically, the first game, but not really.
Several leftover graphics from the first game can be found in DATAPS2\LANG\(EN/FR/GE/IT/SP)\SO_M_SH2.dat. Two similiarly named files, SOMSH2.dat and SO-M-SH2.dat, exist, but they're duplicates.
Text used in the original game's menu screens. It is a little screwed up, however.
Several unused audio parameters are found in the .csv files between the many skins' sound files in this game, present in DATAPS2\SOUND1, DATAPS2\SOUND2 and DATAPS2\SOUND3. They are labeled [SE_11] (fall5), [SE_12] (lvup), [SE_16] (dec_st) and [SE_18] (rap). Despite that [SE_12] is actually filled in the files of one skin, that being TALK 2 YOU (ID 07), the sound tagged in it, levelup.wav, is completely missing.
Near thousands of leftover audio files from UFC: Sudden Impact can be found in sys1.dat, including background music and narrator sound effects. Three other "sys" files exist, labeled sys2.dat, sys3.dat and sys4.dat, but they're duplicates.
The Lumines series
|PlayStation Portable||Puzzle Fusion • II|
|Adobe Flash||II Taster Version|
|Windows||Puzzle Fusion • Remastered|
|PlayStation Vita||Electronic Symphony|
|iOS, Android||Puzzle & Music|