Gangs of Glasgow is a Mount & Blade: Warband mod that takes a dark, exaggerated look at the urban violence Glasgow is unfortunately known for. It's sort of a multiplayer-based team deathmatch game based around rioting football fans in the town, replacing the horses with dirtbikes and cop cars (both of which are still referred to as horses in-game) and the swords with knives and tire irons. There's something bizarrely humorous about the ridiculousness of the in-game graphics and action, but the basis for it all makes it a bit... disturbing.
The mod's been around since 2009, but a new build just arrived on ModDB this week. I'd assume it is compatible with Warband and With Fire and Sword.
Hit the jump for a trailer showing some of the gameplay.
http://www.youtube.com/v/eG6CG2l_KXo?version=3&hl=en_US