Lockpicking guide with pics.
Step 1: Bounce the pin with the lockpick using the mouse. The slower you bounce the more time you have to hold it in step 2 ie slow=more time before it falls out, fast=less time before it falls out.
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Step 2: When the pin enters the top, hit "left mouse click" to hold it there then quickly press "spacebar/enter" to lock it in with the bar. You will lose a lockpick if you don't lock it in quickly enough.
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Step 3: Repeat till it is all done. There is a timer on the bar that counts down as soon as you lock in the first pin so you need to do it swiftly or you will fail and lose a lockpick.
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I suggest you save before attempting it and just reload if you fail or run out of lockpicks. You can also press "esc" to leave and it will not cost you a lockpick even though it says "fail".