Metroid + Saving replaces the password system with a saving system with three files. The file selection menu shows the player’s equipment, and as an added bonus, the player’s health is now saved. No need to grind for health every time you resume your game.
Now included is a scrollable map when paused and the ability to combine the wave and ice beams.
To use this hack, apply the appropriate IPS patch to your Metroid ROM, using a tool such as Lunar IPS. The source code is also included. If you’d like help incorporating these features into your own ROM hack, feel free to contact me.
Can I save without dying?
Yes! Pause the game, and then press UP + A on the second controller. This also works on the original unmodified game (as well as The Legend of Zelda, and probably others, too).
How do I access “JUSTIN BAILEY”? Is suitless Samus gone?
No! The way you’re supposed to access suitless Samus is by completing the game in under three hours. This hasn’t changed. Of course, you can no longer use a password to play as suitless Samus without beating the game first.
How do I access “NARPASSWORD”? Is super-cheat-o-matic mode gone?
YES! “NARPASSWORD” is no longer available, since this cheat can only be enabled via password. You’ll have to find another way to cheat. Sorry.
The “EMERGENCY ORDER” text no longer shows during the title sequence. Is this a bug?
Nope! The “EMERGENCY ORDER” screen was transformed into the file selection screen to minimize the complexity involved in creating the hack.
The music does not loop during the title sequence. Is this a bug?
YES! Because the title sequence was modified (see above question), the part of the program that restarts the music is never executed. I knew about the problem, but chose to ignore it because I kinda hoped nobody else would notice. But they did!
Can I use this mod with Editroid?
Mostly! You’ll want to apply the patch to an unmodified ROM before you begin editing with Editroid. If you do this, the only problem you’ll have (as far as I know) is that the “Test Room” feature will not work correctly. This happens because both Metroid + Saving and Editroid’s “Test Room” feature hack the startup code in incompatible ways, causing the ROM to crash on startup.
If you already have a hack and want to add this mod to it, it won’t be quite as easy, but I may be able to lend a hand.
When I edit the world with Editroid, the map doesn’t change. Is this a bug?
Nope! The map is hard-coded in the ROM. I’ve released a tool to edit the map, available from romhacking.net.