Eugene and Marcus return in the spiritual successor of the very popular HL2 Modification Zombie Panic: Source!
Even if it is early acces it has good balanced gameplay elements for casual gamer but I would say for a better long term experience there should be more maps (maybe community maps with HammerEditor I would create one ;) ) and a mode in which if you die you can´t respawn just if somebody use a defibrillator(or something like that) so it would be somekind of a Hardcore mode.
Greatest zombie multiplayer game of the last few years. the currient 3 different game modes are allot of fun and the way the game is made, every new game you start feels compleetly new. it doesnt get borring like allot of multiplayer games do after youve playd it for a while and to me it seems like the most promesing new multiplayer zombie game of the the last few year. Absolutly love it and higly recomand it to others. if you want a fun zombie game to play online with others, this is the game!