As per the title, it is only $0.99 USD! It's such a cheap price for a game of this caliber.
From the store page:
'ORION: Dino Horde' is an indie Sci-Fi shooter (FPS/TPS) that seamlessly blends together incredible visuals and addictive combat. It puts you and your friends together into intense, cinematic battles using some of the most incredible weaponry and amazing vehicles in which you must work or compete against one another to accomplish mission objectives, explore giant worlds and survive the devastating Dinosaur Horde.
In addition to the return of the adventurous and survival-based cooperative gameplay, 'ORION: Dino Horde' features intense, retro-inspired and over-the-top PvP competitive action via 'The Arena' in which each mode focuses on a specific homage or battle-type.
Can you survive the Dinosaur Horde?
Also, for the Steam Achievements ravers, it includes 250 Steam Achievements!!!
Enjoy! I found the game to be quite interesting and also, I mean. $0.99 USD is insanely cheap.
This is a really good game for a buck. Had it for 2 days now and think it's worth every penny.
Only issue is the lack of Aussie servers, think there's only 1 dedicated server and it only runs the Gun Game mode.