Blockstorm is a multiplayer FPS game (which sold on Steam more than 400,000 copies) set in a world made of destructible blocks.
The voxel nature of characters and maps and the in-game editors allows you to fully customize your game and quickly share your experience with other players.
Weapons range from precise rifles to heavy machine guns or even explosives capable of destroying hiding places and creating tactical advantages.
You can pick out your own load out, choosing between a set of weapons configured by the creator of the map. http://store.steampowered.com/app/263060/Blockstorm/