Derrick Birum

Derrick Birum

Appear in the games: Counter-Strike: Global Offensive, Portal 2, Left 4 Dead 2, Left 4 Dead, Portal, Half-Life 2, Counter-Strike: Source and Half-Life.

Credits (8)

Developer

Cover of Left 4 Dead 2

Left 4 Dead 2

Cover of Left 4 Dead

Left 4 Dead

Valve

Cover of Counter-Strike: Global Offensive

Counter-Strike: Global Offensive

Cover of Half-Life 2

Half-Life 2

Cover of Counter-Strike: Source

Counter-Strike: Source

Cover of Half-Life

Half-Life

Staff

Cover of Portal 2

Portal 2

Cover of Portal

Portal