Some rings will be already visible in the stage, others will be hidden. In addition, the stages will contain a set number of rings to collect. Collecting all blue spheres will award the player with a Chaos Emerald and (if the full game has been accessed) progress to the next level. Silver bumpers with red stars bounce the player, causing them to run backwards for a short time (until the player pushes forward on the D-pad), and orange spheres catapult the player a certain number of squares forward. The player must run around the surface of a 32x32 wrapping square (torus), collecting blue spheres while avoiding red spheres.
(The player cannot play as Tails, or as Sonic and Tails together.)īlue Sphere levels are based on the Special Stages from Sonic the Hedgehog 3 and Sonic & Knuckles. Pressing, , or will switch the playable character between Sonic (represented by blue-star bumpers either side of the word 'START') and Knuckles (represented by red-star bumper). The main menu of Blue Sphere will show the current level number along with a 12-digit code (password) that will allow the player to jump back to the current level. It can also be accessed from the file menu's special stage selection in Sonic & Knuckles Collection for PC. In Sonic Mega Collection and Sonic Mega Collection Plus, Blue Sphere can be unlocked separately (in the former case by playing Sonic the Hedgehog and Sonic 3D Blast 20 times each) and is accessible by itself from the game list. In Sonic Jam, it can be accessed by "locking-on" Sonic 1 to Sonic & Knuckles. Locking on Sonic & Knuckles to another copy of Sonic & Knuckles will also load the game normally.īlue Sphere is also available in certain compilation games. Some cartridges with particularly large ROM file sizes (including Phantasy Star IV: The End of the Millennium and Super Street Fighter II: The New Challengers) will not load Blue Sphere, but will instead boot Sonic & Knuckles as normal. Most other cartridges will allow the player to access only a single stage of the game, based on the cartridge's ROM header and the stage's code in the full Blue Sphere game. If the cartridge that is locked on to Sonic & Knuckles is the original Sonic the Hedgehog (as well as Sonic Classics, the Nick Arcade and Simon Wai prototype versions of Sonic the Hedgehog 2), then the full game of Blue Sphere is accessed with all stages. When any other Sega Mega Drive cartidge is inserted, background characters with a blue tint aren't shown to have animation on the title screen and the code of single Blue Sphere stage is shown. The scrolling text will be replaced by "Get Blue Spheres!". When the original Sonic the Hedgehog is locked on to the Sonic & Knuckles special cartridge, a screen appears with the Sonic & Knuckles logo, models of the characters Sonic, Tails, Knuckles and Robotnik, and a line of scrolling text that says "No Way! No Way! No Way! No Way?" While this screen is visible, pressing, and at the same time changes the screen to the Blue Sphere menu. The title screen with single Blue Sphere stage code, from Sonic & Knuckles cartidge with Disney's Aladdin inserted on the top.
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