Assault 3.0 is a unique codebase probably based on Merc or GodWars, which has an ascii-graphical map and uses RTS-like features for base building. It takes place in a futuristic world and is reminiscent of Ultima.
Assault is based off of ACK Mud, heavily modified, been stripped down. tis a good little base, used to actauly play on the mud-itself, never wanted to delve into its code though, they always had TOO Many problems keeping it running.