Idk if all of these are obscure enough lol

• Battleblock Theater - all the level songs
• Phantasy Star Universe - Mizuraki C.D.
• Panzer Dragoon Saga - Premonition of War
• Ironsword Wizards & Warriors II - Stage Theme 02
• Anachronox - Bricks, Normal 1.0
• The 13th Doll - Path 2 6 Points
• Shivers - The Secret Hall
• Mystic Towers - Atmosphere 3
• Anticipation - Yellow Puzzle (the songs are really short but the way they flow with the game is good, so I linked a gameplay video)