Left 4 Dead 2 Sandbox Servers

What is a Left 4 Dead 2 sandbox server?

Garry's Mod with no gamemode on top of it: an open map, the spawn menu, the physics gun and the tool gun. Players build contraptions, spawn props and NPCs, and make their own entertainment.

What the server allows is the whole character of it — some are strictly build-only with prop protection, others are free-for-all and will be on fire within the hour. `gm_construct` and `gm_flatgrass` are the two maps most of them run.

This is a short list — 1 server on Left 4 Dead 2 at the moment. The full Left 4 Dead 2 list is a better place to start if none of these fit.