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.
In invasion mode, there are 2 bases: The human base and the monster base. The goal of the game is to defend the human base and prevent the spawn pads from getting killed.
You will notice that there are a bunch of monsters that are glowing blue. The blue shell indicates that they are friendly units. Those black/grey looking creatures are necromancers, and these are their minions.
Also in this screen shot is a hellspawn (the floating skull at the top) and a mini-sentry (attached to the bottom of a platform). This may look like a lot, but you can never have enough defense in invasion: The monsters just keep getting stronger!