At the same time, take time to register on their website to access forums and information.
After entering your code in the above link, you will receive a Steam Key to activate the game.
Last step is to jump in and play the game, report bugs and get on the 2Dawn Games TeamSpeak server (information posted in the secured Sponsor forums). You can give your feedback here.
This is a great opportunity to get actively involved in a game development process as the devs will often be on TS. The best times to reach them would be on Sundays between 1pm and 7pm EST. The other official playtests are on Wednesday and Friday (also between 1pm and 7pm EST).
Keep in mind that there will be issues with the game as it is still under development and that we are expected to provide feedback on these issues.
Let’s get those engines revving and those guns loaded folks! See you on the road!