I bought this game yesterday and i installed it.
The serial code works but in the game, when i want to personalize my weapons or start a match in single or in multiplayer, the game ends.
I tried several times to see if the game works but nothing to do.
It is a bug or a problem of the game?

My guess is that this is PC, and by "when the game ends", you mean it closes or crashes?

when i want to personalize the weapons or join in game the game closes! why god why? I have setted everything to minimum.