I didn't read through the whole topic, but i already have a zombie mod.
Nothing big, only the basics... A single zombie is chosen at the beginning and has to infect the other players to get them in his team.
The round is over when all players are zombies.
The player who was infected last will be the new 'only' zombie in the next round.
Is it more like zom_db (basically a lot of different zombies with different damages and perks, humans/hunters have 100 HP and can get back HP by killing zombs, and have mines & repels), or more like afterlife/EHD zombies (only knife for zombies, 1 hit = kill, humans have to aim for the head otherwise it takes a whole clip to kill a zombie)? Or something different?