The gamemode "Aftermath" is developed by Silverlan, he is the only one who owns and works on this gamemode. This gamemode is based on the game "Fallout3", but using different ideas from The Hl2 Renaissance pack (Created by the same author) and Hl2 and others games. "Aftermath" is a Rpg-like gamemode in which you (will be able to) interact with other players, kill creatures to gain experience, skills, and complete quests. This Gamemode is currently in beta, and is open to the public for now.
This is a video showing how the gamemode looked like when the server was up (ITS DOWN FOR NOW) and is now an example for me to show people somewhat of how this gamemode will look like.(This is a pre-alpha so the gamemode may or will look alot different. The player that recorded this was Silverlan himself.)