Uber Entertainment has surprised everyone by releasing a massive expansion for RTS Planetary Annihilation for free.

Planetary Annihilation: Titans was announced and released yesterday for PC. It’s a standalone affair that expands upon the base game while looking to remedy many complaints players had with it.

Its main selling points are: 21 new units including five Titan class super units, multi-level terrain, a better tutorial, better balance, and a new bounty mode. It’s NZ$48, or cheaper if you already own the base game.

You can check out all the changes and features on the official site.