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Upgrade Sub

  • Currently 4.55 / 5 Stars
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About Upgrade Sub

The ocean is filled with enemy subs and shark monsters! The only way you're going to make it back to base is if you upgrade your sub and push through the madness covering the ocean floor. Collect power ups and crash through everything in your path!

How to Play Upgrade Sub

Use the Up and Down keys to move. Use the SPACEBAR to shoot rockets.

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