Do I need an internet connection to play Call of Duty: World At War Zombies on PC?
Solution 1:
No, you do not need Internet to play WAW Zombies. However, you do need Internet to play Multiplayer in general (unless you can find a split-screen mod). When I say Multiplayer, I mean the Multiplayer game mode and WAW Zombies with other people online.
Edit: I have first-hand proof that you do not need an Internet connection to play WAW Zombies. When I play WAW Zombies, I don't need Internet unless I am playing on Multiplayer Modes (zombies, team deathwatch, campaign co-op, etc..).