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Passing a star post makes all 3 Bonus Stages from both games available, including the slot machine stage (20-34 rings required), magnetic orbs stage (35–49 rings required), and the gumball machine (50–65 rings required). Knuckles' levels are different from Sonic's and Tails' in most cases, with new areas and bosses. There are slight differences in object placement in some of the Sonic 3 Zones (Launch Base especially). Sonic and Tails skips the final boss of Launch Base, while Knuckles still has to do it (although he skips the first true boss of Launch Base). Sonic & Knuckles levels are the same, with one exception: the Mushroom Hill Zone is slightly extended at the beginning, has one supplementary Giant Ring (or, in Knuckles' case, two), and gets an intro to tie the level to Sonic 3's Launch Base Zone (Sonic is airlifted in by Tails, Knuckles falls down after having jumped from an exploding platform).Go to Angel Island 1, grab onto a swinging vine, and press Left, Left, Left, Right, Right, Right, Up, Up, Up. A ring sound will play if you did it right. Press Alt + R to reset the game and from the title screen press Up to reveal "SOUND TEST" and press Enter. The method of unlocking the level select in Sonic 3 & Knuckles apparently works in Sonic 3 alone (a good thing, too, considering it's a lot easier to unlock this way) though debug mode won't be unlocked along with it and you can select any Sonic 3 zone as usual (but not Flying Battery, Mushroom Valley, Sandopolis, or Bonus). In Sonic & Knuckles, this method must be done on the pulley lifts in Mushroom Hill Zone. Though you can enter the debug menu code in-game, you cannot use any object placement functions as controls are limited to four directions and a single key for jumping. However, you can properly enable it by creating a file named "S3K.ini" in your C:\WINDOWS directory (where C:\ is the main partition used for Windows) and typing the following into the file: #Download sonic 3 and knuckles rom code DebugMode - "1" will fully enable debug mode.Note also that generally "1" means the option is enabled, while "0" means that it is disabled:
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When you load up any of the games, you'll start at the level select screen instead of the Sega logo. From there, just select any level and it'll be turned on automatically. As with the console versions you get unlimited time, a coordinates display, a sprite counter, and invincibility. In object placement mode, press Numpad 3 to place the selected object.In object placement mode, hold Numpad 1 and press Numpad 3 to move backward one object.In object placement mode, press Numpad 1 to move forward one object.Press Numpad 2 to toggle object placement mode.When debug functions are enabled, the numeric keypad is mapped to the three buttons on a Mega Drive/Genesis controller, so make sure you have NumLock turned on. #Download sonic 3 and knuckles rom code.
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