We are currently finishing up the (free) Grasslands DLC and Version 6.0 for ORION: Dino Horde on Steam. It may even release later today!!
http://store.steampowered.com/app/104900
Version 6.0 will fix and adjust a variety of aspects in the game including many community-based suggestions during the recent Steam F2P event!
On top of this we are adding a new world variant for the open-world Conquest game mode called 'Plains'. This grasslands world is fully of valleys and vistas and it is a great change of scenery compared to the frozen cold.
We are also introducing new weather systems including Rain and Lightning!