Premise? Frankly, no clue.
Gameplay? Fun deathmatch games that can be played in mp or solo, and are horribly balanced, especially against AI with their laser accuracy with guns.
You choose loadouts of different weapons and equipment that all affect what you can do during a game, with plenty variety.
Pitbulls have mauled me several times.
Maps all thematically fit well but their design ain't too crazily detailed, but do set the tone and theme well still.
Pretty good, scuffed, mod, but not something you'd play for a long time.