Project Generic Zombie Survival
Since you gave up on BlockCraft I propose this idea,
-RPG Elements (leveling up and getting money for killing zombies)
-Can use money to unlock guns (weapons restricted by level)
-Large Map, hunger mod (you need to find food to survive)
-Forts, similar to safehouses (food and ammo, you also buy weapons there)
-Rotondo's zombie mod.
Builders:
-Make the actual map.
-Make designs.
-Try and make the gameplay fun.
Eventers:
-Money and leveling systems.
-Some RPG Elements.
-Generic eventing stuff :/
Scripters:
-Hunger mod
-RPG stuff
-Custom Weapons
-Trap system (item that traps zombies and tumbles them)
Modelers
-Model Weapons
-Make models for custom AIs?
I think this could be pretty fun, we'd need scripters and modelers though :/