Offblast is one of the community maps chosen by Valve and was included in The Classless Update as an honorary official map due to its outstanding quality.
Arena Offblast is a fast-paced, high-altitude community map set in a top secret missile silo wedged into the top of a hollowed-out mountain. Open-air paths and narrow hallways converge on a central control point located just under the silo’s blast doors.
This mountaintop arena also boasts a sheer cliff face encircling the battleground, giving you the chance to help your opponents improve their tactics. Specifically, anyone you blast over the side will get some time to think about the various flaws in their “standing next to the edge of a cliff” strategy as they plummet to an excruciating, non-respawnable death.
Like all Arena maps, the goal of Arena_Offblast is to eliminate the entire enemy team or capture the central capture point. The round starts with a set amount of time for players to attack each other, and then the capture point is made available to stop stalemates from occurring.
The map consists of a large secret missile silo built into a mesa in the middle of the desert. Precarious ramps scale the outside of the mountain cliff sides that lead up to an innocent looking mill which is connected to the inside of the hollow mesa, while long catwalks and corridors dominate the spy-tech stylized interior. There is a small health kit in the mill and a large ammo crate under it.
Pyros, Scouts, and other classes with high Knockback potential will benefit most from the long drop that accompanies being pushed off the ledges on the sides of the map.
Soldiers can easily defend the middle capture point due to the high level of elevation which provides easy shots of rockets down to the lower elevations.