This is a fun Mod by a guy called Gary it costs around $10 but its totally worth it you need either half life 2 or counter strike to be able to play it
Garry's Mod Website <----
it gives you the ability to build maps and edit existing ones easily you can make your npcs play zombie survival there is even a game called Stranded which is a form of Roleplaying but this is all first person and it has ALOT of guns
Garry's Mod Website <----
it gives you the ability to build maps and edit existing ones easily you can make your npcs play zombie survival there is even a game called Stranded which is a form of Roleplaying but this is all first person and it has ALOT of guns