Windows

Guild Wars

Sadly ArenaNet first began to include credits (both manual and in-game) in the successor Factions. And at an email-request by ArenaNet, the answer was "sorry, but the game is too old to compile a credit list for it".

So it probably stays a long time credit-less. :(

Trivia entry!

I really hope IGDA can make a mark with their credits guideline (where a few of the MobyGames admins contributed). That, along with Stardock's Gamers Manifesto.