(IMPORTANT)
before I start, I want to tell you NOT to read this if you haven't finished the game's first 2 endings--this will spoil a lot of the game!(tip--if you answered "no" when kazuma asked you if you wanted to escape w/ him and don't know what to do, start climbing up the wall.)
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this is a short walkthrough on how to get to (not complete--I'm not going to spoil the final area of the game for you), in the game Cave Story, what is commonly known as "Hell".
(this will not be a COMPLETE walkthrough, just main points you need to know)
•the first thing you need to do is in the end of the labyrinth. when you come to the room where the screen flashes and prof. Booster falls from the ceiling, DON'T go down to talk to him. jump up to save, then get to the very back of the ledge you came in on. run towards the gap and jump when your feet touch the red mark on the floor. you need to long jump to make it; if you miss, just restart and try again. {WARNING} you must save before you jump if you don't want to fight monster X again. I don't care how sure you are that you'll make it: SAVE! when you get across, continue to the core.
•when you get past the large blast door, ignore curly and go down to the bottom right of the room. inspect the object there and you get the tow rope. go to curly and fight the core. when you "drown" you'll be given some extra story text--you'll understand later. when you come around, inspect curly and take her with you with the tow rope. {WARNING} you must take her BEFORE you leave; once you get past the large blast door, it closes. continue into the waterway.
•when you reach the point in the waterway when there are jellyfish in a large room, clear out the jellies and jump down. when you are squeezed out of the hole at the end, jump up onto the ledge. (this is harder than it sounds. just keep trying) go in the door and inspect the computer. rest and go to the computer again. end of pt.1