Death is a key character in the Painkiller series.
Death appears to Daniel Garner and offers him a deal: in exchange for 7,000 souls he will reunite Daniel with his wife Catherine, who also died in the same car crash that killed Daniel.
Eventually, Daniel obtains the required souls, but Death disputes this - claiming that he has only captured 6,999 souls and not the full 7,000 required of him. He demands Daniel deliver one final soul - that of his friend and ally, Eve.
Daniel refuses, invoking Death's wrath and a final battle between the two (in which Daniel is victorious and Death is slain).