Retro games cheats thread!

Here you post cheat codes you know about retro games.

Access All LevelsTriangle, Triangle, Triangle, Triangle, X, Square, Triangle, Triangle, Triangle, Triangle, Square, X, Triangle, Circle, Triangle, Triangle, Triangle, Circle, Square, Triangle, X, X, X, XBoulders - 9% CompleteTriangle(3), X, Circle, Square, X(3), Circle, Circle, Triangle, Triangle, X(3), Circle, X, Square, Triangle, X, Circle, Square, Circle.Castle Machinery - 80% completeTriangle(2), X, Triangle(2), X, Circle, X, Circle, X, Triangle(2), Square, X, Square, Circle, Triangle, Square(2), Circle, X(2), Square(2).Castle Machinery at 85% completionTriangle(3), X, Circle, Square, Triangle(2), Circle, X(4), Triangle, Square, Circle, Square, X(3), Square, Triangle(2), SquareDr. Nitrus Brio - 70% CompleteTriangle(2), Circle, X, Square, X, Circle, Square, Circle, Square, X, Square, Triangle, X(3), Square, Triangle, X, X, X, Circle, Circle, Triangle.Generator Room at 56% completionTriangle(2), Square, X, Square, X, Circle(2), Triangle, Circle, Triangle(3), Square, Triangle(2), Square, X, Square, Circle(2), Square(2), CircleHeavy Machinery - 45% CompleteTriangle(2), Square(2), Triangle(2), Square, Circle, Square, Circle, Triangle, X, Triangle, Square, X, Circle, X, Circle, Square(2),X(2), Square(2).Heavy Machinery at 50% completionTriangle(3), Square, X, Circle(3), Square, Circle(2), X(2), Square, Circle(2), Triangle, X, Square(2), Triangle(2), Square(2)Jungle Rollers - 3% CompleteTriangle(2), Circle, X(2), Circle, Triangle(2), Square, X, Circle, Square, Circle, Triangle(2), Square(2), Circle, Triangle, X(2), Triangle(2), X.Level 13, Temple Ruins, No Gems and 27% CompleteX, circle, X, circle, circle, X, square, circleLevel 17, Koala Kong, No Gems, and 36% CompleteX, circle, circle, circle, X, square, X, squareLevel 7, Rolling Stones, No Gems and 13% CompleteX, square, X, circle, X, square, triangle, XN.Sanity Beach - 1% CompleteTriangle(2), Square, Circle, X, Circle, Triangle, X, Square, X, Circle, Square, Circle, X, Square(3),Circle(2), X, Triangle (3), Circle.Native Fortress - 21% CompleteTriangle(2), Circle, Square, Triangle(2), Circle, X, Circle, Sqaure, Triangle, X, Circle, Square, X, Triangle, Sqaure, X(2), Circle, Square(2), Circle, SquarePinstripe at 63% completionTriangle(2), Square, Triangle, Circle(2), Triangle, Square(2), Triangle(2), X(2), Square, X, Triangle, X(2), Square, Circle, Triangle(2), Square(2)Ripper Roo - 26% CompleteTriangle, Triangle, Square, Triangle, Circle, Square, X, X, Circle, Square, Triangle, X, Circle(4), Triangle, Circle(3), X,Cirle, Square, Circle.Skip to Third IslandTriangle, Triangle, Triangle, Triangle, O, X, Triangle, Triangle, X, X, Triangle, O, Square, O, X, Triangle, Triangle, O, Square, X, X, Square, Triangle, TriangleSlippery Climb - 68% completeTriangle(2), X(2), Square, X, Circle, Triangle, Circle(2), Square, Triangle(2), X, Circle, X, Circle, Triangle, Circle, X, Square(4).Slippery Climb at 75% completionTriangle(3), Circle, Triangle(2), Circle(2), Triangle, X, Square, X, Circle(2), Square, X, Square(2), Triangle, Circle, Square(3), CircleStart at Neo Cortex with 67% completeCircle, Square, Triangle, Circle, X, Square, Circle, Triangle.Start with half of the levels completed.Triangle, Triangle, Triangle, Square, Square, Square, Triangle, Circle Circle, X, Square, Square, Triangle, Triangle, Circle, Circle, Circle, X, Square, Square, Square, Circle, Triangle, CircleSunset Vista - 42% CompleteTriangle(4), X, Circle(2), Square,Triangle, Square, Circle, Triangle, Circle, Triangle, Circle, Square(3), Circle, X, Circle, Triangle(2), Circle.Temple Ruins - 31% CompleteTriangle(5), Square, Triangle, Circle(2), Triangle, Circle, Square, Triangle(2), Circle(3),X, Square, Square, Circle, Square, Triangle, Circle.The Lab - 87% CompleteTriangle(3), Square, X(2), Circle, X(2), Square, Circle, X(4), Circle, Square, Triangle, Square, Circle(2), Square(2), Triangle.The Lab at 95% completionTriangle(3), Square, Circle, Square, X(2), Square, Triangle, Square, Triangle(2), Square, Circle, X(2), Square, Triangle, Square(2), Circle(2), XThe Lab at 98% completion (all but one gem)Triangle(3), Square, Circle, Square, X(2), Square, Circle, Triangle, Circle, Square, Circle, X, Circle, X, Circle, Square(2), Circle, Square, X(2)You will have 11% completionSquare, Square, X, Square, Square, Triangle, X, TriangleYou will have 13% completionX, Square, X, Circle, X, Square, Triangle, XYou will have 18% completionSquare, Square, Triangle, X, Circle, Circle, X, TriangleYou will have 2% completionCircle, Square, Circle, Square, Circle, Circle, Triangle, Square,You will have 22% completionCircle, Square, Square, Circle, Circle, X, X, XYou will have 27% completionX, Circle, X, Circle, Circle, X, Square, CircleYou will have 36% completionX, Circle, Circle, Circle, X, Square, X, Square,You will have 38% completionSquare, Square, X, Triangle, X, Square, Circle, X

Funny how you can remember certain cheats.

Sonic up down left right a start. Level select. We all know that one.

Mortal kombat abacabb at kombat code screen access blood mode. Plus dullard on main menu for secrets menu.

Shame games dont do this anymore

Go play GTAV, they still use cheat codes to this day.