This one is the first of what will be two releases today. The main reason it is coming out now is that it fixes a couple of key balance and bug issues present in the prior version. But it also includes three new monsters, bringing the game's total up to 116.
More to come soon. Enjoy!
This is a standard update that you can download through the in-game updater itself, if you already have any version of the game. If you have the beta on Steam, it will automatically update for you. When you launch the game, you'll see the notice of the update having been found if you're connected to the Internet at the time. If you don't have the standalone game, you can download that here. If you already own the first game, just use your existing license key to unlock the sequel for free!