Left 4 Dead 2's new "Mutations" system of game variants is just two weeks old, and already one variant is becoming a permanent option. Valve has announced that Realism Vs. mode, the very first Mutation initiated last week, will eventually becoming a permanent option in the game. Additionally, they also revealed the second Mutation for the game: Follow the Liter.

Via the TF2 Contribute web site, Valve challenged gamers to make their own Team Fortress 2 items. The game's community responded with enthusiasm, and the best weapons, hats, and items they created were included in yesterday's TF2 update.

Valve kicked off its Midweek Madness Left 4 Dead 2 half-off sale today, and in the process provided some details about what we'll find in the game's anticipated upcoming DLC pack, The Passing.