I completed Rochard, the other day, and my ending was horrible. It's not really relevant to the question, but I'll give a brief description anyway (spoilers):
Maximilian gets sucked into a vortex. Rochard and Skyler talk for a bit, and Skyler begins to say something about a mysterious excavation which took place on Earth a number of years ago, and involved both Maximilian and her uncle Floyd. Suddenly, a new vortex appears and both Rochard and Skyler are sucked into it. The camera pans down to Rochard's 'Helga' mining tool, dropped on the ground, which lays there with a red blinking light on it. Fade to credits.
So, understandably, I was left with a few questions. I'm wondering if it's possible to achieve different endings to the game, given that this ending was so horrible. Is this the only ending possible?