Hm, Neil's Metroid Lua page has been down since forever ago. Anyone have a working mirror for those who might wish to try it out? Romhacking.net doesn't host it (probably because it's a script and not a patch?).
EDIT: oh, here's
a mirror of the file
It's a good hack, just limited by the fact that it's a Lua script and thus only usable only a select few emulators (well, only 1 the last time I checked). I prefer snarfblam's Metroid + Saving hack myself, linked earlier in the thread.
EDIT: should probably post other quality-of-life hacks I'm familiar with:
Ninja Gaiden III Restored - english version of NGIII that reverts the game to the way it was in the JPN version, including a working password system.
Contra Hard Corps M.I.J.E.T. Enhancement - cleans up the script and adds some user-friendly features
Contra Hard Corps Hit Points Restoration - restores the life bar from the Japanese version (a.k.a. Easy-er Mode) + other goodies. Can be applied in conjunction with the M.I.J.E.T. patch.
Phantasy Star II has a few hacks that try to improve the game by removing the endless grinding and fixing bugs present in the original game. Of these,
Phantasy Star II Modernization Hack seems the most promising: 2x Exp/Meseta gained from battles, re-balanced character stats and what equipment they can use that gives them greater utility especially near end-game and other changes. It's also still being worked on unlike some other hacks. Now if only someone can come up with a working 'speed up walking' patch, which is really the only thing the Phantasy Star Collection version has over any of these patches.
I'm also aware of a
Secret of Mana hack that's attempting something very advanced: changing gameplay mechanics to allow for things like binding spell-casting to specific buttons, better partner A.I., giving magic a recharge time like when using a melee weapon (fixes the one thing that's broken about magic casting in the game), variable attack strength (think Smash attacks), manual blocking and dodging and other stuff. Check it out if you're interesting, could be something amazing if and when it's ever finished.