Sonic Gems Collection - Platform: XBox - Console Games.

Sonic Gems Collection - Platform: XBox

Unlocking Museum games:
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Play Sonic Gems Collection once every day and accumulate over 24 hours of game 
play time. Then, start the game 30 to 70 times to unlock the different end 
Bosses to many classic Sonic games that you can play.

Unlocking Museum bonuses:
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To unlock most of the pictures in the Museum, just start each of the main games 
five or ten times. Then, play each one for a few hours. Just leave the game 
idling; you do not have to be actually playing for that amount of time.
To unlock the playable endings, three movie trailers, and the last picture in 
the museum faster, change the day portion of the GameCube's system date. For 
example, change August 25, 2005 to August 26, 2005. Then, start the game. Once 
you go to the museum you will have more playable endings and/or movie trailers 
unlocked. Repeat this process until you have all three movie trailers and 
sixteen playable endings in the museum. This will also get you closer to 
unlocking the final illustration.

Unlock full versions of game demos:
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Once you have unlocked all the playable ending demos, use the following trick to 
unlock their full game counterparts. Go to Sonic The Hedgehog (either version), 
Sonic 2, Sonic 3, Sonic 3D Blast, Sonic Spinball, Robotnik's Mean Bean Machine, 
or Sonic Chaos. Keep intentionally killing Sonic until you are out of lives. The 
game will end, then restart at its own title screen. From there, you can start 
at level 1 of the game and play until the timer reaches zero.

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