Rampancy

After the Metroplis closing cutscene, most fans were getting set to break out the pitchforks and the torches to protest that Halo 2 was denying them what they had expected to get-- a long, drawn-out, large-scale invasion of Earth to battle against. That's a shame, because the next two levels, Delta Halo and Regret, are where Halo 2 really starts to shine, although there still are a number of differences from the first game that may eventually prompt fans to fire up the prequel.