over the last 2 weeks I have beaten:
-Final Fantasy II (IV) hard-type. Excellent hack, its better than the original game since the original is so easy. With the hard-type hack there are a few battles that are more difficult but its not overly difficult.
-Super Valis IV. I beat the Famicom version on hard mode. The Japanese version has 3 settings: easy,normal and hard; while the US version has only normal and hard.. however hard mode on the Japanese version is actually easier than the Normal mode on the US version. So its actually like the US version has very hard & very very hard modes.