We played around with The Walls (too lazy to link atm), kind of like Hunger Games (players start out in one of 4 ‘cells’, get variable amount of time to setup/gather/trap, after time walls come down to allow PVP). It’s fun, but I didn’t get to random terrain for a bit so it got repetitive kind of fast.

There are some concepts I like that have been around for a while (overseeing Game Master who can change field conditions/obstacles at will, ability for outside parties to gather resources to assist players, survival PVP, etc) that can be integrated into a good game mode. It’s just getting the energy/time to do so.