Many of you may not heard about HAWKEN, the game is a fast paced free to play multiplayer 1st person shooter with mechs, based on UDK engine.
Here's a (old) gameplay video to make an idea on what the game has to offer:
nVidia is giving away 10000 CBT keys, interested? head here: link
Register to win an exclusive Hawken beta serial code from NVIDIA and be one of 10,000 gamers to experience the Beta Weekend Event from October 26th – 29th, 2012. Winners will be chosen at random and all registrants will be notified on October 26th of the results.
Note: existing ALPHA testers are automatically invited into the CBT