As you know, deathmatch maps don't gain overwhelming popularity in Counter Strike: Global Offensive. However, Zool Smith, a modder, combines deathmatch mode with Quake, creating a free and cool Quake-themed map. There are lava waterfall background, jump pads, items, health pickups, modified movement for bunnyhopping and quick turns resembles classic deathmatch maps.
Just like Bomb Defusal and Hostage Rescue, the meat and potatoes lie in its team-based modes.It is no doubt that Deathmatch exists. However, it gets nowhere near as much attention as the previously mentioned modes, since it's mainly used as a warm-up. It is hoped that Zool Smith can mod a rocket launcher in F4ST Castle for a true Quake experience.