The Riftbreaker is a base-building game with action-RPG elements, that has an alpha demo you can download over at its Steam store page, developed by EXOR Studios.
You play as Riftbreaker captain Ashley S. Nowak, a scientist / commando with an epic Mecha-Suit, in a distant planet Galatea 37 in the far reaches of the galaxy.
You have to construct a base by finding a range of equipment, harvest resources and gather specimens as you combat enemies in a harsh environment in order to get back to earth.
