The Left 4 Rats comparisons are accurate. Levels are quite lengthy with some decent scenery and backdrops to look at when you're not slaughtering rats. And holy crap, the rats! Or Skaven. Or whatever nerdish Warhammer lore title they have. THE RATS! Standing on a staircase above a pile of a dozen rat corpses...wish I had taken some screenshots, but I was too busy bopping other less dead rats on the head with my giant hammer.
There's a decent variety in weaponry to suit differing playstyles: sword & shield, massive two handers, ranged bows/guns/fireballs, although the game often devolves into a massive cluster where hacking the

out of everything is the best solution. After missions, you have a chance to get some RNG'd weapons which are 95% guaranteed to be for a character you don't like to play. It's an extremely slow loot trickle, unfortunately. The combat is satisfying enough though to encourage replayability, it doesn't have the weighty feeling of the similar FPSMelee Dying Light but a homerun swing of my hammer would send 4 or 5 rats spinning to their ratty graves.
It definitely is a game best played with 4 people. Our three ratkiller team was gimped by the addition of an extremely stupid AI controlled partner. If any of you nerds need a Division Dew Valley break, hit me up and we'll smash some ratheads.