[PC][90’s/00’s] Top-down Quake 3 engine game with guns and green light sword

Many years ago, I played a demo of a game that I think used the Quake 3 engine (or some other cutting edge ID engine but Quake 3’s engine is about the right time in history). It played like a Doom/Quake inspired game but it was a top-down view - not FPS.

Your character was a regular looking guy, maybe a solider, and you had guns, pretty sure a beefy shotgun, and the melee weapon was a light sabre, but I don’t think it was called a light sabre - it was a glowy stick you could wack things with. I think it was bright green.

It was set in a city with buildings, the world seemed post-apocalyptic, and there were bits of trash scattered on the ground. And there were these alien things, kind of like Borerlands’ skags, that would run after you, and while you could shoot them, the sabre worked quite well.