Another week, another new trailer from Spore Maxis and EA's upcoming evolution simulator. This newest trailer demonstrates the game's tribe phase, explained courtesy of narrators Lauren McHugh and Alex Kerfoot, two software engineers who have been hard at work on the game.

Lauren explains that the goal of the tribe phase is to become a civilization. This goal can be completed one of two ways: by combat, which sees you "dominate all the tribes and wipe them out," or by befriending the other tribes.

Download the Spore tribe phase trailer from Big Download.