Few gamers probably know about ZDaemon, and probably even less have tried it. Here's a look at a game flying under the radar.

ZDaemon is client/server based on Doom 2 which is most similar to the Quake series than any other game. It shares many weapons(SG, SSG, RL, plasma, chaingun, etc), and even some engine tricks on movement(wall running, strafe tricks). ZDaemon has very low system requirements, and decent unlagged netcode(56kers/sub 200 pingers are fairly competitive). It comes with a custom server browser which has built in chat, buddy system, server favorites, and a nice autodownloader to find all the files you need to play on servers. ZDaemon doesn't require extensive config editing nor is it as aim based as most modern DM games.