This game felt like it shouldn't have existed on the OG Xbox. The graphics, the action, the multiplayer, all truly felt next gen.
Aside from that, between mounting, dual-wielding, EARTH fights, the scarab, the prophets, those big-ass robots you have to fight, this felt like it should have been multiple installments down the line from Combat Evolved. If you weren't around for this, I can't express how big of a deal this game was when it came out.