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If the game detects that it is being played on a catridge copier, you won't be able to run, jump, or shoot in the game, technically making the game unplayable.
subdirectory_arrow_right Jet Force Gemini (Game)
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In an October 2012 interview, former Rare designer and producer Martin Wakeley said, "Jet Force Gemini on the Gameboy was the only occasion I can remember Rare outsourcing anything. It was being done by Bits Studios and was nearly done last time I saw it, I'm not sure what happened to it."
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Vela's old model wasn't completely removed, however. Her character model can still be seen in the game's cinematic ending, kicking a red ball around.
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Beating the high scores on the two "Jeff & Barry Racing" games (30 seconds for the first, 40 for the second) will unlock a map for multiplayer mode. The map is that of Greenwood Village from Diddy Kong Racing, which Paul Mountain, the lead programmer, had previously worked on before this game.
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According to the Lead Programmer, Paul Mountain, the entire game took elements from different games. It had Super Mario 64's open world and free-roaming nature for scale, Quake-style "attack and cover" mechanics, and Super Metriod's collecting and upgrading of weapons.
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