Doctor Robotnik's Creature Capture is a hack of Sonic the Hedgehog created by MarkeyJester. It stars Doctor Robotnik with a cameo by Sonic the Hedgehog. The objective of the hack is to play as Doctor Robotnik and try to capture as many creatures as possible by using a net to carry the creature to the creature capsule. Level select is enabled by default and almost all levels are open from the start.

Doctor Robotnik's Plan B is hack based on Sonic the hedgehog made by Painto the hack focused on new boss fights. This one is the same exact version as the last release except one small bug, due to focus on Scorched Quest.Features:* 7 new boss fights - the zones consist only of these, as nobody feels like playing S1 over again with just new bosses. The bosses are using (mostly) original zone boss weapon in more or less direct way, except for SBZ, which originally didn't had a boss.Besides from the main point, I added small little features:* Normal and Time Attack mode - added these after suggestion from my Team, so the game has a bit more replay value. In Normal mode you get 5 lives, while in Time Attack you have infinite amount of these. The progress isn't saved so if you get a Game Over, you need to play it again (Normal mode only, as TA doesn't have Game Overs).

Contra: Hard Corps, released in Japan as Contra: The Hard Corps (魂斗羅 ザ・ハードコア?)[1] and in Europe and Australia as Probotector, is a side-scrolling run and gun-style shoot-'em-up video game released by Konami for the Sega Mega Drive/Genesis in 1994. It is part of the Contra series and serves as a follow-up to Contra III: The Alien Wars. The plot takes place several years after the events of that game. Contra: Hard Corps follows the same gameplay as its predecessors. New features include branching story paths and multiple endings.

Rise of the Robots is a 1994 fighting game developed by Mirage Studios and published by Time Warner Interactive. It was ported to numerous home console and computer formats, and was also released as an arcade game cabinet. The game is very similar in style and gameplay to other fighting games popular at the time, such as Street Fighter II and Mortal Kombat, but with pre-rendered CGI sprites rather than pixel art or digitized sprites. The game's characters, including the player, are all robots, and the plot borrowed heavily from the cyberpunk genre, specifically such movies as Blade Runner, Metropolis, RoboCop and The Terminator. Rise of the Robots was announced early in development, and generated considerable buzz for its advanced graphics. On release it became notorious in the video gaming industry for myriad crippling gameplay problems. Today it is generally considered one of the least successful and most critically reviled fighting games of its time.

A hack based on Sonic 2 made by Pacguy.The sequel to Robotnik Returns, Robotnik Returns 2 (you can call it RR2 for short). Vastly improved from the previous demo, and mostly hidden from the public, this hack has been in the works for quite some time...Credits: Music: JoenickROS for the music ports, KHinsider for the midis they were based on, and Flamewing for the S3, S&K, and S3D blast ports I stuffed in here and there. And last but not least, Clownacy, for creating the Clone Driver V2, without which this hack would probably have default or horrendously ported music :V Code: MarkeyJester and MainMemory for various fixes and guides, RedHotSonic for his many cool guides, and Selbi, whos' guides offered me realms of understanding, and made things like the custom character moves possible for me to do :3

Robotnik's Revenge is a hack of Sonic the Hedgehog 2 by ColinC10. It is a "boss rush" hack, in which all seventeen bosses from Sonic the Hedgehog and Sonic the Hedgehog 2 are fought in a somewhat arbitrary order over the course of a single level. The game takes place in Death Egg Zone from Sonic 2, and is meant to imply that there is more to the ship than there is in the original game.