From the second you start playing, BioWare makes it immediately clear that Mass Effect 2 isn't pulling any punches. It makes a point of spotlighting the suggestion that Commander Shepard and his team likely won't survive their suicidal retaliation against an unknown enemy. This isn't cheesy foreshadowing of an unavoidable future, however. Your actions dictate your fate. Cross your fingers you make the right decisions along the way.