The Constitution Class Starship Enterprise from the show; 26 decks, 2 million+ square feet, 1.2 million blocks (after optimization). Not really a practical deathmatch map, as it’s WAY too big and the design was not optimized for DM (e.g., lots of rooms with only one entrance or exit, etc). It’s also not set up for single player. Think of it more as a sort of modern art- it exists for it’s own sake.
Sauerbraten, also known as Cube 2, is a free multiplayer/singleplayer first person shooter, built as a major redesign of the Cube FPS. Quadropolis hosts lots of user-made content for the game, including ranked maps and mods.
Download: [ quadropolis.us ]