First I would like to mention that the merciless is a movie. But it is one of the most thrilling movies i have ever seen.

As well as Im Siwan has been playing his role in Strangers from hell as good or even better he played the MC in the Merciless. It is a dark and complex role. The movie too has overall a dark theme but the plot is quite different from Strangers from Hell.

Give it a try, I swear you shall not be dissapointed.

Both are quite dark featuring prison, gangsters, violence and death. They both also contain a surprising plot twist and ending. I personally believe that someone who liked Bad Guys will also like The Merciless.