You have been invited by the Stomper Babes ^^...
If we sent you an invite it was cause:
1.) You have L4D2 and you played good at it!
2.) You got DayZ and you are noobing with us!
3.) It was cause we just have fun! fun! fun! and we want to play with you again :3

~Female Gamer~[9gag.com]