Sonic Jam (Game.com)

Sonic Jam
Developer: Tiger Electronics Publisher: Tiger Electronics Platform: Game.com Released in US: July 10, 1998 Released in EU: July 10, 1998 This game has unused graphics. This game has unused text. This game has a prerelease article

The Game.com Sonic Jam is not actually a port of the Saturn version. Rather, it's just a collection of levels inspired by Sonic 2, Sonic 3, and Sonic & Knuckles mixed with bleepy music, ugly black-and-white graphics, and an abysmal framerate.

And you thought Sonic '06, Sonic Genesis, and Sonic Boom: Rise of Lyric were the worst?

Unused Graphics

Prototype Graphics

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Graphics for an earlier version of Sonic & Knuckles, including the larger HUD that can be seen in prerelease material.

"No Lock On"

Presumably, Sonic & Knuckles would have had support for "locking-on" the Sonic 2 and Sonic 3 cartridges for new content, similar to the Saturn version. This would be the icon shown when playing Sonic & Knuckles by itself.

The Lost World: Jurassic Park Leftover Text

At 0x525CF is text leftover from the Game.com version of The Lost World: Jurassic Park.

A;B;C;D;E
F;G;H;I;J
0;1;2;3;4
5;6;7;8;9
HARDING
TEMBO
AREA
HUMVEE
MOTORCYCLE
CARGO
CARRIER
RV;MOBILE;LAB
SNAGGER
RV;3
STEGOSAURUS
PACHYCEPHALOSAURUS
TRICERATOPS
PROCOMPSOGNATHUS
VELOCIRAPTORS
TYRANNOSAURUS;REX
PTERODACTYLS

Misplaced Rings

In Act 4 of Sonic & Knuckles, a couple of rings which were meant to be placed in a loop are shifted slightly to the right and up of their intended positions.