While Numantian Games continue work on the singleplayer campaign for Early Access RTS hit They Are Billions, they've also been sliding bonus stuff into the survival mode that's currently available. The latest patch adds a new zombie type called the Infected Giant, a behemoth so big they're marked on the minimap so you know not to expand in their direction until you're ready to take them on.
The giants only appear if you're playing on Challenging difficulty or above, but for those players who've already mastered their build queues there's also a new difficulty called Nightmare that adds three giants to the map and 30% more zombies than Brutal mode already has. A few tweaks to armor, new map features, and other bits of balancing have also taken place and you can read about that on their blog.
This brings They Are Billions up to version 0.9. It's available on Steam.