Complex sentence: However things soon turn nasty as Richard sneaks into a club where the gang are hiding out and playing cards and kills one of their members with an axe, using his blood to scribble the words "One Down" on the wall.
Split into simpler sentences: However things soon turn nasty as Richard sneaks into a club where the gang are hiding out and playing cards. He brutally kills one of the members with an axe, using his blood to scribble the words "One Down" on the wall.