We started the RotD2 Alpha test Friday night. Its missing a lot of key features, so the game will be upgraded to Beta when those are implemented.
If you wanted to help test and give feedback (not just play it early) let or know and we can add you to the list of current testers.
There's a website that is listed in the game's menu and author comments that you will need to go to,. If you're not interested in reporting bugs and stuff, please just wait for the full release :D
We are in the final stretch, will be awesome to finally finish this beast!
fun fact: the game was originally an idea I had to basically make road1 Redux, with some new stuff, and an extra mini campaign to play as 2 soldiers with shooting. We ended up pumping it up so much it became a full sequel.