MM9 - Challenges keep falling. For my fourth playthrough I beat the game without dying, without falling into a pit, beating the robot masters with no helmet (i.e. double damage) clearing four stages using entirely one special weapon (Laser Trident, vs. Magma/Concrete/Plug/Galaxy, and yes I stacked this with no helmet, making Plug Man a bitch). And got a record time while I was at it (yay reloading whenever I died <_<). Discovered you could use Concrete Shot to freeze the magma beams, then dismissed this as useless because Rush Coil works better and faster anyway.
F-Zero GX - Completed this for now. Which is to say, I beat all the Expert Cups, and completed Story Mode on Normal difficulty. It's kinda boggling how much harder stuff there is still to do, since Story in particular was a bitch. The GP derives a bit too much of its challenge from falling off the edge, which combined with longer courses than in X, just isn't fun. Aside from that and the music, the game is pretty rocking. Fun, fast, technical racer that's generally a joy. I'll no doubt return to it again at some point, but I think for now I consider my achievements adequate to move onto something else.
MMXCM - In the middle of Chapter 3. Plot remains epic. Gameplay at this point isn't as exciting as later on; game benefits a lot from party switching.