Skulltag

Skulltag is a source port by Brad "Carnevil" Carney, based on ZDoom with network code originating from Quake 2. Its gameplay has been described as an addicting hybrid of Quake 3: Arena and Doom. A popular way to play SkullTag is to connect through the chat program SkullTag Online.

Features

 * Supports most ZDoom features.
 * Client/server multiplayer architecture.
 * Customizable, dynamic bots.
 * New weapons, items, and monsters.
 * Medals to award achievements during multiplayer mode.
 * New multiplayer modes, including CTF, Last Man Standing, One flag CTF, Skulltag, Team Deathmatch, and Instagib.
 * DECORATE Support for custom monsters