AssaultCube VS Cube 2 (Sauerbraten)

Assault Cube, is usually recommended as a starting point. Source: about 1 year ago

Assault Cube should run on pretty much anything, and it's free. https://assault.cubers.net/. Source: over 2 years ago

Pretty sure AssaultCube has LAN (not sure though - https://assault.cubers.net/). Source: over 2 years ago

Assault Cube is a simple old, free FPS game.Kinda counter strike like.It runs on anything: https://assault.cubers.net/. Source: almost 3 years ago

If you haven't heard of it, AssaultCube is a really good, lightweight game that functions as a basic FPS and is quite easy to start out in cheating with, but also has the ability to cheat in more advanced functions like aimbot once game hacking comes easier, and there are hundreds of tutorials on getting started with cheat engine in AssaultCube. (Note that while there is Online mode, stick to singleplayer since... Source: almost 3 years ago

This makes me want to make a Lego Sauerbraten map. Source: 5 months ago

Out of curiosity I landed at http://sauerbraten.org and was not disappointed by the video. - Source: Hacker News / 5 months ago

The editors are basically immediately off limits for anyone who wants to mod the base game rapidly for their own enjoyment. A concept like http://sauerbraten.org/ is interesting, but seems to not have taken off for various reasons. Lesson learned I guess is that being able to customize is not everything. - Source: Hacker News / 8 months ago

N-Space 2 will let you build on multiple levels of detail. Instead of a single size of cube, there is an adjustable "grid" which scales from 1/16 of a block to 2 blocks. This massively expands the possibilities for modelling. I was inspired by the Cube 2 engine, which has a similar approach to building on different levels of detail. Source: about 1 year ago

This might help, sounds like an unreal or quake game. Maybe Cube 2 Sauerbraten as well. Source: over 1 year ago