Games like sonic 3 & knuckles

Sonic & Knuckles is a 1994 platform game developed and published by Sega. It is part of the Sonic the Hedgehog series and the sequel to Sonic the Hedgehog 3 (1994). Players control Sonic the Hedgehog and Knuckles the Echidna in their quests to save Angel Island; Sonic tries to prevent Doctor Robotnik from relaunching his orbital weapon, the Death Egg, while Knuckles scuffles with Robotnik's minion, EggRobo. The game takes place across six levels in which the player collects rings and fights bosses.

Sega Technical Institute developed Sonic & Knuckles simultaneously alongside Sonic 3. The two were intended to be released as a single game, but time constraints and small cartridge sizes forced Sega to split the project. The Sonic & Knuckles cartridge features "lock-on technology" that allows the game to connect to the Sonic the Hedgehog 2 or Sonic the Hedgehog 3 cartridges, combining elements from both games. This feature was implemented so the game could be experienced as intended.