I haven't played all the Halos but i played equal measures of Halo CE and Metroid Prime, generally accepted as the best games in their respective trilogies, around the same time.
As a single player experience Prime kills Halo, but it is surprising how much the Halo experience improves when you play it in co-op.
Based on those two games i still give the edge to Metroid but i love them both.







