#15
Minetest is what you reach for when the group wants to slow down. Voxel sandbox, local server support, fully free, and genuinely easy to self-host on any reasonably modern machine. The reason it does not crack the top ten is that it asks for something most LAN parties are not set up to give it: patience. The first hour is setup and orientation, not action. For a dedicated session where someone builds a world in advance and everyone just drops in to explore and build together, it works well. As a pick-up-and-play LAN option, it is harder to recommend over the faster games above it.