The Ward2001

The Ward is a point and click adventure video game. The story follows the fictionalized version of events of the Apollo 19 mission from 1979. Two of the crew member are found dead, with the protagonist, David Walker, finding himself in an extraterrestrial laboratory. Throughout the story, the protagonist realizes he is meant to be the mythical Ward, in order to resolve the conflict between two alien races; the Greys and the Reptillians.
He sets out to help humanity from total annihilation, but also aids Greys in their war against their former masters, the reptillians. During the course of the adventure, he uncovers many secrets and histories of the universe.