While alpha footage may be common enough, it's still a bit of a rarity to see pre-alpha stuff. Rebirth is an upcoming survival game that will have you struggling to survive in a chaos-riddled world with a barely breathable environment. The game will apparently have things like crafting, third-person combat, RPG elements and so forth. Most interestingly, perhaps, Rebirth will feature what the developers call 'Full Body Awareness'. Right now, all it does is show what kind of equipment you're carrying but there are apparently plans of having it integrated into gameplay itself. We'll see.

You can keep track of the game here.