Zero Gravity is an early B&W arcade game for Macintosh, in which you try to center your floating character in the center of the gravity chamber. A white dot appears to indicate where the gravity force is currently applied and you move accordingly to stay away from the chamber's sides.
Duane, the software author, died a year after releasing this game and their parents released the full version for free to the public domain (version 2.0). Both versions are included in this download.
Zero_Gravity.sit (48.12 KiB / 49.27 KB)
Zero Gravity v0.91 + v2.0 (full game) / compressed w/ Stuffit
ZeroGravity1.0.sit (23.84 KiB / 24.42 KB)
Zero Gravity v1.0 / compressed w/ Stuffit
Mac OS 6.x - Mac OS 9.2.2
Emulating this? It should run fine under: Mini vMac