You don't have to go away from Earth to find living organisms that are enough to blow your mind away, or to see what some bacteriae in hostile environments might be like. Have you ever heard of "extremeophile bacteria?" (For those who haven't, they are bacteria that survive under the most hostile and amazing conditions.) All over Earth scientists have observed bacteria living in thermal vents, living off of inorganic rocks deep in the Earth, thriving in concentrated sulfuric acid, even inside nuclear reactors! There is even the bizzare case of bacteria that lived on the moon unshielded for years (no wait, that might've been a virus, which doesn't count). Our world is much more diverse then people think!
I know this answer is not exactly what you were looking for, but I think it needed to be said. Life is very likely similar no matter what kind of conditions you give it.

__________________
Give me a firm place to stand and I will move the Earth.
-Archimedes