The Mac Oni engine from OmniGroup has been upgraded over the years through the efforts of the Oni community.

Latest version

List of in-place patches

A brief timeline of the upgrades so far:

Date	Offset	Old hex	New hex	Description
2008/06	0x0005E4C2	00	7F	Increased flailing timer (For jetpack hack)
2008/06	0x001151C3	04	10	to support 512x512 textures EDIT: Oni still crashes
2008/05	0x000E2D19	7A	9A	non-"_Final" levels are now valid
2007/07	0x00096DCB 0x00096DE3	04 04	20 20	pathfinding grid cache size x8
2007/05 2007/06 2007/07	0x00189FDC	90 61 00 18 90 81 00 1C 90 A1 00 20 90 C1 00 24 90 E1 00 28 91 01 00 2C 91 21 00 30 91 41 00 34 4E 80 00 20	7C EA 3B 78 7C C9 33 78 7C A8 2B 78 7C 87 23 78 7C 66 1B 78 38 60 00 00 38 83 FF FF 38 A3 00 01 4B F2 F6 F8	console output display fixed
2007/01	0x001B6050	0D 00 00 0A	0D 00 00 0D	Return/Enter key fixed
2006/08	0x00117B36	1F 03	1F 02	"Intel fix" (GL extension list?)
2006/06	0x0019024B	00 00 00 14	00 00 00 0B	killmequick bound to Dev Mode

NOTE: Increasing the buffer size to accomodate 1024x1024 textures doesn't work because of a limitation elsewhere in the engine.; Therefore, the patch will only allow for 512x512 until further notice. BTW, 512x512 is plenty for virtually any purpose.