Field Commander is easily one of the most disappointing PSP games ever. Rtype Command makes up for all of that. While the cutscene loading is kind of a pain (can can be turned to random frequency or off completely) the slightly modified advance war formula works great here. I'm only 3 missions in here and its been a decent challenge even on mission 2 which is considered a tutorial. I do find it hilarious that the Force objects require a pilot assignment lol.
(http://ecx.images-amazon.com/images/I/519Oujo1fyL._SL500_AA280_.jpg)
If you want turn based strat in a sci fi setting, this is the game to get. Also, get Wild Arms XF, it deserves more love. FUCK FFT