Millennium 2.2 is a resource management computer game by Ian Bird, released in 1989 for Atari ST, Amiga and MS-DOS. The MS-DOS version of the game was released as Millennium: Return to Earth. It is the forerunner to Deuteros, which is in many ways a similar resource management game but many times larger and harder than Millennium 2.2.

Millennium 2.2 is a resource management computer game by Ian Bird, released in 1989 for Atari ST, Amiga and MS-DOS. The MS-DOS version of the game was released as Millennium: Return to Earth. It is the forerunner to Deuteros, which is in many ways a similar resource management game but many times larger and harder than Millennium 2.2.