[Lior .B.]

you know, the ultimate sacrifice could have been this:
first of all I would have force the player to play Arrival POST SM Misson.

now instead of sacrifice the batarians (which isn't a "hard" choice for most players) Image we had to choose between letting the Reaper Use the Relay Or destroying it with the Normany and our entire squad!

lets assume that the batarians attack and disable the Normandy's engines and it can't use the relay. Shepard can escape with a shuttle via the relay before the asteroid hit it.

Now THAT would have been the Ultimate Sacrifice not some 300k batarians that no one cares about.