If you play straight through Tactics and don't bother to level or understand the system very well, its a mean game and alot of the "protect useless" missions will see you getting the game over screen. Not to mention Weigraf/ Belias fight is pretty hard even if you do overlevel a bit.

As for IX, it has the return of the high encounter rate and if you are silly like I am and level a bit you run into problems if you don't pace yourself. Its not that hard, but compared to TA, TA2, RW, and VIII its a bit more challenging.

I just rated the games she still had left to play.