Vollgas (šifre)

Vollgas 
                                        
Hints:
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If you stop moving and don't touch anything for a few 
min, a screen will come up that shows a bunch of different 
vehicles and rotates them.

If you have some trouble fighting those bikers on the old 
mine road, try this:
When the fight starts press [LeftShift][V] to win. 
You might have to repeat it a few times.