Pick your 'disadvantaged group' (Jocks, Emos, Chavs, Hoodies) and start the 'High School Wars' in this (hopefully un-) realistic schoolyard simulation.
Go get some 'rapid tactical action' in the cool rts battle game 'Pixel Legions' where you control pixel clusters and have to destroy all those enemy bases.
The strategy game 'SporeCraft' is a kind of StarCraft for all microbiologists of you. It's very important that you learn 'The Basics' (tutorial) first!
Build new colonies, military forces and defeat other, hostile armies in this strategy game. But first, get some briefing and play through the tutorial!