sonic gems colection is a sonic game where you play classic sonic games. theres 3 main games, 6 game gear games, and 2 unlockable games which are not sonic games. Theres a meuseum where you can see lots of illisrations some movies and demos of sonic games from smc/smc+ where you play the final boss and theres a time limit if you finish the boss quick enough you can play the main game. Theres also hints tricks and cheats, and classic game manuls.

Main games
Sonic CD: 9.6 a sonic game from the sega cd it is fun to play and you can collect time stone and warp through time.

Sonic R: 8.8 A game from the saturan it is a racing game it is very short though.

Sonic the fighters: 9.4 A sonic fighting game

gamegear games
sonic 2 game gear version: 7.1 Not at all ike the oringinal version plus it is extramly tough

sonic spinball gg version: 1.7 worst sonic game ever

Sonic tt: 9.4 A cool game It is like sonic chaos but better

sonic drift 2: 8.5 A sonic racing game it is like sd 1 but with more character

Tails sky potraol 3.7 it sucks

tails adventure 9.2 A fun game where you play as tails and have an adventures you can get power ups.

Unlockable games Vetorman 8.8 Vectorman 2: 8.8