A pretty nice FPS with some fun combat, encounters and level design, all of these aspects may be kinda dated now but there's still a lot of joy to get out of this game.
It doesn't take itself too serious which is a good thing considering that the game is a about an arrogant as fuck hitman that just can't stop spewing bad jokes and puns killing demons and shit.
The dialogues are funny, the story is servisable and the gameplay offers enough variety to get you going through the 11-13h it lasts.
Give it a try if you are into shooters.