Tetris (Sharp X1)
This game has a hidden sound test.
Tetris from Bullet-Proof Software, but on the Sharp X1. Unlike the version on PC-88, the Sharp X1 lacks very heavily compressed voice samples whatsoever (that the Sharp X68000 version also has, but not as heavily compressed).
At the BPS screen, hold down the PC-88 version, with an additional sound effect test.to access a menu with a music test. A similar feature also exists in