Game Sonic 3 & Knuckles
Author/Vendor Sega
Released ----
Game Type Platform
Language English
Turn RasterFx ON. Minor Graphics problem in bonus stages (Shadows).
Gens (1.10)

By plugging Sonic 3 into the top of Sonic & Knuckles using the latters unique "Lock-On" technology you can replay the game as Knuckles. Some of the levels contain ares that are only accessible using Knuckles leading to speculation that this game was designed with "Lock-On" technology in mind, or (More likely) that Knuckles should have been present from the start, only to be dropped later in development.