14 achievements for 1000 Gamerscore
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Vertically Challenged
Beat the Arcade version of Alpha Mission.
75 Gamerscore
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A Wise Choice
Beat the Arcade version of Athena.
75 Gamerscore
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God Slayer
Beat Crystalis.
100 Gamerscore
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Rebels with a Cause
Beat the Arcade version of Guerrilla War.
75 Gamerscore
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The Warrior Within
Beat the Arcade version of Ikari Warriors.
75 Gamerscore
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Showed Some Guts
Beat the Arcade version of Victory Road.
75 Gamerscore
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Rescue Me
Beat the Arcade version of Ikari III.
75 Gamerscore
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Tread on Them
Beat Iron Tank.
50 Gamerscore
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No Escaping the Fun
Beat the Arcade version of P.O.W.
75 Gamerscore
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Pterodactylized
Beat Prehistoric Isle.
75 Gamerscore
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Athena, I Will Go
Beat Psycho Soldier.
75 Gamerscore
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Street Smarts
Beat Street Smart.
50 Gamerscore
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A Full Tank
Beat TNK III.
50 Gamerscore
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On Guard
Finished the second level of Vanguard.
75 Gamerscore