BlackSite: Area 51 is the sequel to the 2005 game Area 51. The player takes on the role of Aeran Pierce, a Special Forces operative facing hordes of alien forces around a secret military research facility in Nevada.

BlackSite: Area 51 is a squad-based first-person shooter with basic commands to direct team members. The game features a Squad Morale system, which changes the soldiers' performance depending on how well the player leads them in battle.TeamXbox: BlackSite: Area 51 Review (November 16, 2007)

The multiplayer facet of BlackSite: Area 51 allows up to ten players to face off in games of capture the flag, deathmatch, team deathmatch and other standard multiplayer fare.GameSpot: BlackSite: Area 51 Multiplayer Hands-On (October 29, 2007)