Wish, I present to you another Freeware game, in a similar vein to Cave Story. This however has 'shittier' graphics & music, as it was based off of the old MSX system. Do NOT let that fool you into thinking this is an inferior game, however.

Essentially, you are an 'Indiana Jones' type character, that after a few brief prologue events makes his way into a vast labyrinth filled with deadly traps and secret passages. The game is said to take over 25 hours to complete, at least 10 even if you know where everything is.

You must carefully contemplate every action you take, as simply tripping a switch in the beginning could have some sort of unseen effect hours later on in the journey.

It's a great game, try it:

http://rapidshare.com/files/112842438/LA-MULANA.rar.html

Related websites:

http://agtp.romhack.net/project.php?id=lamulana

http://en.wikipedia.org/wiki/La-Mulana

(Note: be sure to start a new game, my save data may still be there)