A lot or a little?
Parents need to know that Archetype is a violence-driven first-person shooter game in the vein of Halo. It is centered around team deathmatches (two teams of up to four players each chase each other around a maze and kill one another over and over until time runs out), and both your teammates and your opponents will be random strangers. Other players can only see your screenname, though. The game is full of both gun-based and melee-combat, and frequently shows the spilling of blood.