Are we 100% sure that Tychus is dead? Weren't there 2 more Marines in the same room? What happened to those two guys? Tychus was a strong support character, I would not be surprised to see him again. After all you never do see the bullet hit......
I think its like Inception. You just can't be sure how it ends.
[Edited by bodza2006, 8/5/2010 4:18:49 PM]
i am pretty sure, that tychus is dead, as the game itself tells you that after the outro movie.
-andy-