Crysis 2 patch to correct two errors associated with multiplayer activation keys for the PC version of the game, a representative confirmed on the game's official MyCrysis Forums. In the meantime, the developer has laid out a workaround intended to side-step both users' inability to save their keys in the system (and thus forcing would-be players to re-enter the codes) and the erroneous error that claims, "Serial number in use." It's a three-step move, to be precise:
- "Load Crysis 2, go to multiplayer and type in your key"
- "Navigate back to Single Player"
- "Go back into multiplayer and re-enter your key"