Call Of Juarez Bound In Blood <3

Anyone know to to fix the serial key problem?
Bought this game recently and me and a friend wanted to play some multiplayer but when you press it it wants a serial key.
Bought the game on STEAM and not g2a or kinguin.

Somebody cure my depression

add me if you play

it sucks tere still server up so why making it stupit

gameranger is a sort of desura or somting?

Hello on gameranger everybody play with 1.0 version and steam version is 1.1 so its not possible if you have any solution?