i can get the launcher to show up , but thats it i get error code 53 every time i try to run

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door to the submarine room doesn't open, guy inside the submarine room doesn't press the button for me, and I can't shoot the sub down from the rope.

As title suggests i'm in the canyon and comm tower level, i've made it all the way to the top of the tower and hit the switch for the cutscene, then fought off all the guards and mercs to get to the air lock that ends the level but the button won't respond, unsure how to proceed now...

by the way i finished the game with 0 patches and full screen stretched windows 10, for the submarine bug, quickly quick save before the sub explodes then load it, then it doesnt explode, works 100% of the time, for the full screen, change your windows resolution down to the games res to something like 800x600 i think it was something like, that then start the game, close the game change your windows resolution back to 1080. then start the game. for some reason the game now plays full screen 1080. teste...