Easy lives!
First, go to Marble (Zone 2) Act 2, in the middle of the act, you come out of the dungeon with help from two moving wall blocks, you can hit a checkpoint lamp, when you do this, get at least 1 ring, and go back down to the part with the grey blocks and bubbling lava, after falling, head to the left wall, you'll go through it and land into a secret room with 20 rings and a life, grap the life, pause the game and press Quit, on the main menu, press Restart, you'll appear back at the checkpoint, now do this all over again, the Life won't ever dissapear! Do this as many times as you want!
More tricks, tips and cheats for this game are right here - Sonic The Hedgehog Genesis cheats
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