Blue Sphere Plus

Blue Sphere Plus
Version: 11
Last release: May 10, 2011
System: Sega Genesis/Mega Drive
ROM size: 1 MB
Original game: Sonic & Knuckles
Credits: MainMemory

Blue Sphere Standalone ROM is a Sonic & Knuckles hack created by MainMemory. It is a standalone ROM which contains Blue Sphere, the game that is unlocked when Sonic & Knuckles and Sonic the Hedgehog are Locked-On. It also has a few extra features.

New Features

• Pressing or now cycles between Sonic + Tails (blue + orange bumpers), Sonic alone (both blue), Tails (both orange), Knuckles + Tails (red + orange bumpers), and Knuckles (both red).
• SRAM support to remember the character you last selected, and the last level completed.
• If holding while pressing to start a stage, the player starts all stages from then on at top speed (not saved between sessions).
• You can now press at the first screen to reach the menu, instead of holding + + .
• Select "SONIC 3K" on the first menu, and you will play through all 16 of Sonic 3 & Knuckles' Special Stages in order. Saving and code entry are disabled while this mode is active, and the game will reset upon completion of the last stage.
• Can Lock-On to other ROMs, including the Sonic games that would normally enable special modes when locked-on to Sonic & Knuckles.
• Users can lock-on a file containing custom levels to play.

Known Issues

• On real hardware, sound effects cause the music to glitch.
• The code for a level from a locked-on ROM is displayed without having to complete it first.

Downloads

Download Blue Sphere Plus File: Blue Sphere Standalone ROM v11.7z () (info) Current version: 11

Previous Versions

• Version 10 ^(info) ()
• Version 9 ^(info) ()
• Version 8 ^(info) ()
• Version 7 ^(info) (266 kB)

External links

• 
  Sonic Retro discussion thread