Soleron on 09 September 2010
1. Prime
2. Prime 2
3. Fusion
4. Zero Mission
5. Hunters
6. Prime 3
I haven't played Other M but from what I've seen and read it would be below Prime 3 there. The mistake of Prime 3, Fusion and Other M is to introduce a story line/voice acting; the mistake of Prime 3, Hunters and Other M is to make the game a linear FPS rather than the more open exploration of Prime and Metroid I.
Interestingly I'd rate the music composition in the same order. I believe there's significant correlation between game quality and music quality.
