This article contains a list of glitches from the 2013 remaster of Sonic the Hedgehog (16-bit). Unless otherwise noted, all glitch names are conjectural. Many of them have not been confirmed by Sega.
List of glitches
Tails glitch
The player must select No Save Mode and then enable Debug Mode. From there, they should select character 00, go to Green Hill Zone Act 3, then kill themselves twice with spikes. Once that is complete, they must kill themselves once more by using Debug Mode to go under the ground and then deactivating it, causing them to receive a game over. Finally, they need to start a Sonic only game, and they will now have Tails. (Note: If the player beats the act, Tails will remain permanently)
Golden Sonic glitch
With Debug Mode activated, the player must place down an S monitor, smash it, and enter Debug Mode again. After the player hears the transformation noise, they should exit Debug Mode. Sonic's fur will turn golden, but his quills will not be upturned, and he will run normally rather than flying.
Sonic's Super design
The player must play as Sonic and turn Super in any way with Debug Mode enabled. They then need to activate Debug Mode, pass the Goal Post and wait for the sign to stop spinning. The player should not be able to move, but if they press back athey the player will be able to move again. When the zone's music starts again, the player must exit out of Debug Mode. Sonic will mostly still be Super Sonic, but his speed will return to normal and his fur will return to its regular blue color. Sonic will remain in this state until the player either reaches the next act, or ends the game.
Water jump glitch
If the player goes to any act in Labyrinth Zone and then travels to a location where they can stand half in and half out of the water, they should wait for the water to be at the character's waist and jump. The character will jump as high as a red spring would launch them. This glitch also works in the 2013 remaster of Sonic the Hedgehog 2, although it is more difficult to perform there.