Collection
Vafthrutnir: Collection
Vafthrutnir: Collection
Steam
DVD Set
Steam
Steam
Steam
PlayStation Greatest Hits CD
DVD
DVD/Steam GOTY
GOTY Edition
DVD
GOTY Edition
GOTY Edition
PlayStation Greatest Hits CD
CD
Playstation Greatest Hits CD
Cart.
Cart.
Cart.
CD
CD
DVD
DVD
PS2
PS2
PS2 GH
PS2
PS2
PS2
PS2
PS2
PS2
PS1
N64
PC
PC/PS
PS2
PS2
PC/Steam
PS
PS2
PC
PC
N64
Half-Life Platinum Collection
Half-Life Platinum Collection
Steam, S-A
TOB
TOB
Steam Summer Sale '11
Steam
Half-Life Platinum Collection
GOTY
Steam
DVD
PC