I hear Payday: The Heist
has a notorious high difficulty level, even if you stick with the safe/pussy levels of Easy or Normal. As such, I don't have any intents on playing it anytime soon.
In spite of that, I quite like the game's style, and with the No Mercy L4D crossover level, my enjoyment of it has only increased. These robbers are not guys to be trifled with.