Take note: Hitman Sniper is not Contract Killer with a glossy shine. I was actually quite surprised to find out it's more like a high score-chasing puzzle game that just so happens to involve bullets.
Each level (2 locations are planned for release, with more expected at a later date) has a primary target that you'll need to take out in order to complete - but simply offing your mark right away won't net you much. To really rack-up a high score and get your name somewhere respectable on the leaderboards you'll need to build up combos by offing guards that are wandering around the environment. But this is no gallery shooter; you'll be able to shoot out railings guards are leaning on, create distractions by shooting alarmed cars, and interact with the environment in all sorts of ridiculous ways.
There are also upgradeable weapons, of course, as well as a Rival system that pits you against the player immediately above you on the leaderboards so you'll have a reasonable score to try and top every time you play. Everyplay support is also included, which means you'll be able to save your most spectacular setups and combos to show off to all your friends.
Hitman Sniper will be coming out this Fall for free.