Space/Time Beam
This will cause the whole game to restart EXEPT, the items you carry at the time, this means if your at the mother brain, you can play the whole game WITH ALL ITEMS, BUT, you will NOT have missles, because in the open video it gives samus four missles to use and then takes them away. to do this you have to be in a fairly large room, NOT ALL BIG ROOMS WILL WORK, then use the murder beam WITHOUT WAVE BEAM EQUIPED, fire the beam and then leave the room without fireing agian, after that go save your game and then restart, you will have all items.
More tricks, tips and cheats for this game are right here - Super Metroid cheats
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