A hack based on Sonic the hedgehog 2 made by snkenjoi Aperture Science's Portal Gun finds its way into Sonic 2.The portals in the game actually affect objects other than sonic - to the extent that you can kill an enemy with its own projectile if you fling it back at it.Credits:E-122-Psi - sonic's spritesheetflamewing - help with collision detectioniojnekns - portal spritesFraGag - testing

A sonic 3 hack made by JoenickROSIts been about 3 years since I last released this, now for some of you who have played this before you probably wont feel like much has changed since the last release but there has been quite a few additions and a lot of bug fixes that I will list towards the end of the hack description.Levels: Bayside Atoll Zone (Act 1), Nightside Atoll Zone (Act 2), Frost Mountain Zone (Act 1), Frost Cavern Zone (Act 2: New), Neon Lights Zone (Act 1), Carnival Street Zone (Act 2), Wacky Workbench Zone (only one act), Dystopia Zone (only one act), Massacre Temple Zone (Act 1), Tidal Tempest Zone (Act 2), Mushroom Cavern Zone (Act 1), Mt. Inferno (Act 2), Forgotten Cave Zone (only one act), Lakeside Garden Zone (Act 1), Sunset Garden Zone (Act 2), Locust Dunes Zone (Act 1), Midngiht Dunes Zone (act 2), Ancient City Zone (only one act)Player Modes: Sonic and Tails (default option go into the options from the title screen to change it), Sonic (alone), Tails (alone), Knuckles (alone), Knuckles and Tails, Shadow (alone), Tails and Sonic, Tails and Knuckles, Sonic and Knuckles, Knuckles and Sonic.

Sally Acorn in Sonic the Hedgehog 2 (aka Sally in Sonic 2) is a fan-made ROM of the game Sonic the Hedgehog 2 for the Sega Mega Drive/Genesis, with Princess Sally Acorn as a playable character in place of Sonic the HedgehogThe game was modified by Sonic Retro member E-122-Psi, with additional programming and coding by other members including MainMemory, Qiuu and Snkenjoi.