The second battle with Trask. In which Ashley gains his Access power, and using Knightblazer, you utterly DEMOLISH it. Despite it being a tough boss not an hour or so ago. What an AWESOME way to introde the Second Hour Super Power!
The return of Brad. He starts by saving the entire party from being annihilated by Odessa's ultimate weapon by using a hand-held railgun, which is described as being normally vehicle mounted(!) and crippling said super-weapon with only two shots. Then a flashback reveals he survived his earlier Heroic Sacrifice by taking down a perfect copy of himself and sacrificing it instead of himself.
The FINAL Final Battle. You've just defeated the Empodiment of the Kuiper Belt. Which was possible via the Heroic Sacrifice of Inrving. The plot heavily implies that despite the good intentiions and result, Invings methods wre wrong. You had no chance however of subverting his machinations. Thus, as the party exits, they exchange words of melancholy. There is no sense of JUSTICE!. Then, BOOM, Ashley hovers into the air, heart exploding with power as Lord Blazer has FINALLY gained enough Negativity to break free. Ashley finds himself alone on what looks like a barren moon, with the Arghetlahm embedded in rock a few feet away from him. Lord Blazer's voice booms from all around, launching a HUGE Hannibal Lecture, questioning and ridiculing everything the heros have done so far. Ashley then gets up, goes over to the sword, and proceeds to proclaim that he fights 'for a world that needs no heroes'. Then pretty lights come out of his friends, coverging on him. He prepares to draw the sword once more...Annd... Que the Boss Battle set to an EPIC! ORCHESTRAL! version of the games theme song!