Hitman games have a really complicated story-one that I liked most.I mean,you're an illegal clone of 4 biggest criminal masterminds making you a superhuman assassin(not to mention your 47 chromosomes) and you begin your journey.You get betrayed and you kill your own professor and then retire before rejoining ICA and large number of crazy things happen like one of your client who hires you to kill him himself! And then you discover some shocking stuffs and more shocking things follow when Alpha Xerox and Franchise get's involved.The plot isn't over yet and I think something big is coming in the next game.
Gameplay:
Both games are well known for their sandbox style gameplay.Their replay values are basically 'infinite' unlike most singleplayer games...Oh yes,they are both single player only games with absolutely no multiplayer and yet they're amazing.The freedom in playthrough is just incredible.Both games allow you to play in your own ways-either guns blazing or stealth through.You kill targets in incredible ways making accidental and inventive kills like poisoning food and drinks,releasing heavy mass object on one's head,making explosions look like experiments gone wrong or stopping time,possessing a guy when he shoots and putting him in the bullet's course causing a friendly fire,setting traps with springrazor etc.And you get to clean up your kills too which Hitman shines brightly in.But I guess Dishonored offers a bit more freedom.At a point where you can actually change the story of the game.You can even complete the whole game without killing or touching anyone... And name another game which allows you to play as a hagfish or a rat.
Graphics and environment:
Both games have completely different graphics.Hitman games have a real living breathing world in their game-a perfect virtual reality as seen in Hitman Absolution with that awesome NPC AI showing different classes and races of people and how they interact in a world of sheer realism and detail while Dishonored depicts a plague ridden city in a steam punk oil painting art style and a combination of English and Scottish architecture showing the aftermath of a violent flood.