Ok i suggest: BattleField1942,

Reason: It is a Multiplayer game, multiplayer games are the only real games that are worth having long discussions about because they always change and it is possible to organise something in groups with those games easily.

BattleField1942 is a popular game, it is a game that many people are jumping into very fast and when people get into a game like that they tend to get popular, and other things related to them get popular too, such as forums such as this one.

So i recommend BattleField1942

My sig won't show =/