Timeline of development
| Apr. 2, 1997 |
Engine quietly begins development under Brent Pease |
| May 15, 1997 |
Bungie West announces they are hiring; Michael Evans and Alex Okita onboard by this point or soon after |
| May 23, 1998 |
Oni is announced along with Myth II at E3 |
| Dec. 28, 1998 |
Myth II uninstaller bug is discovered, costs Bungie about $800,000 |
| May 13, 1999 |
Oni appears at E3 with hands-on demo running in multiplayer mode "Blam" project is shown to a select group behind closed doors |
| Jul. 21, 1999 |
Oni appears at Macworld NY running in multiplayer mode Halo is announced |
| Aug. 12, 1999 |
Take-Two Interactive purchases 19.9% stake in Bungie, becoming the distributor for Oni and Halo |
| Dec. 1999 |
Brent Pease leaves the Oni team |
| Jan. 5, 2000 |
Oni appears at Macworld SF and is shown on BungieTV running in multiplayer mode |
| May 2000 |
The announcement is made that multiplayer mode has been canceled |
| Jun. 19, 2000 |
Microsoft purchases 100% stake in Bungie and Take-Two gains full IP rights over Oni and Myth |
| Aug. 28, 2000 |
Oni enters beta phase of development |
| Nov. 4, 2000 |
Creation date on game data in the Windows retail release |
| Nov. 17, 2000 |
Oni is gold mastered for Windows |
| Nov. 20, 2000 |
Creation date on game data in the Windows demo and Mac retail release (in .sep format) |
| Dec. 15, 2000 |
Bungie West officially moves to Microsoft's headquarters at Redmond |
| Dec. 17, 2000 |
Windows demo released |
| Dec. 20, 2000 |
Oni is gold mastered for Mac?; creation date on game application in the Mac retail release |
| Dec. 22, 2000 |
Mac demo released |
| Jan. 2, 2001 |
Second possible date of Mac gold master |
| Jan. 22, 2001 |
Oni is gold mastered for PlayStation 2 |
| Jan. 29, 2001 |
Official release date for Oni in North America on Mac, Windows and PS2 |