Blockstorm

"Blockstorm is a destructible-world shooter game with excellent visuals and customizable gameplay. Using an in-game editor, players can create their own characters, maps, and weapons in a voxel-based world. With support for multiple modes including Deathmatch, Team Deathmatch, Capture The Flag, Assault, Castle Battle, and Hunt, players will have plenty of opportunities to utilize weapons ranging from precise rifles to explosives for tactical advantage."