Assassinorum: Execution Force

From the publisher:

Assassinorum: Execution Force gives four Imperial Assassins an incredibly important mission - slay Chaos Lord Drask before his dark ritual brings about the end of the Imperium itself! A fast-paced co-operative game for one to four players, it blends stealth, tactics, subtle forward-thinking and outright blazing violence into a fantastic, tense, action-packed experience that is accessible to board game players of any level.
It contains everything you need to play to defeat the Chaos Space Marines Sorcerer. The game comes with:

Included in the box are four beautiful, exclusive Imperial Assassin miniatures - the Vindicare Assassin, armed with an Exitus Rifle and pistol, clad in a stealth suit; the Callidus Assassin, wielding a C’tan Phase sword, neural shredder and poison blades; the Eversor Assassin, with Executioner pistol and Neuro Gauntlet and the Culexus Assassin, with his psyk-out grenades. On top of these, you get fifteen Chaos Cultists, three Chaos Space Marines, a Chaos Familiar and a Chaos Space Marine Terminator Sorcerer.

On top of these incredible miniatures, there’s a set of detailed board tiles on heavy card stock, a deck of Event Cards, counters for various events in different shapes, sizes and designs and included dice.