Vortex is an Action-RPG for Quake 2! The first playable version of it was release in 1999 and here we are, 10 years later, still around thanks to continuous updates, improvements, and a strong fanbase! Kill monsters and players to gain experience points, which learn you levels. You are rewarded with ability and weapon points. Use these to purchase some unique abilities and upgrade your weapons! Become a tank, spawn monsters to fight for you, or deploy devices to aid you in battle! With over 100 abilities and 10+ different classes to choose from, there is NEVER a dull moment in Vortex.
If you already have Quake 2, here's the mod files (and some maps). Just extract to your Quake 2 installation directory and then connect to a server. Any missing files should be automatically downloaded.