Millennia Altered Destinies DOS

Millennia: Altered Destinies is a PC game created by Take 2 Interactive in 1995. It casts the player as a human freighter captain who finds himself transported to an alien ship. There, an alien calling himself a Hood gives the player a mission to save the Echelon galaxy which is about to be taken over by a malevolent race called the Microids. Apparently, the Milky Way is next should the player fail.

The only way to stop the Microids is to travel back 10,000 years in a specially-designed ship called XTM. It is equipped with everything the player will need to complete the mission. The player must then populate the Echelon galaxy with four indigenous races and ensure their development into powerful spacefaring civilizations.

The Hoods also state that this is not the first time they have tried to interfere with the timeline. To succeed, the player will have to fight off the previous attempts by the Hoods to alter the course of history.

- Wikipedia