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If you've ever been into the old sierra adventure games than you are doing yourself a disservice if you've never played GK. The characters and voice acting are pure excellence, even though the game has a difficulty level well above what any amateur player will be capable of figuring out. Even still, GK1 is the oldest and, incredibly, the most stable of the three as it doesn't utilize 3D technology like the third or FMV like the second. And it is well worth the 6$ it goes for.