Warhammer 40,000: Inquisitor - Martyr is an upcoming action-RPG that aims to combine the grim darkness of the Warhammer 40k universe with the open-ended gameplay of the Diablo series. What this means in gameplay terms is that Inquisitor - Martyr will feature randomized levels, a massive focus on replayability, a ton of different weapons and abilities to toy around with, and naturally, hordes upon hordes of enemies to mow down.
If this sounds like the type of game you might be interested in, allow me to share with you the recently posted gameplay trailer that showcases the current Alpha state of Inquisitor - Martyr. In other words, the footage you're going to be watching is not from a fully finished game, but it is still polished enough to give you a good idea of the direction the developers are going in:
While Inquisitor - Martyr is definitely shaping up quite nicely, I do have a couple of issues I would love to see resolved by the time it reaches beta, let alone release. First and foremost, the combat is way too slow for an ARPG. In order for a character to feel powerful it needs to be able to mow down small baddies by the hundreds, and right now that doesn't seem to be the case. The second and equally important issue is the presentation. The visuals are pretty damn awesome, I have no complaints about them, but the animations and sounds are just not up to snuff. Bolters and Plasma Rifles are weapons capable of utterly obliterating anything they hit, but their impact animations and sounds just do not currently reflect that awe-inspiring power. Inquisitor - Martyr is still in early Alpha so I won't judge it too harshly, but these types of problems will need to be sorted out as we move closer towards release.
If you would like to test Inquisitor - Martyr yourself, and you have a bit of cash you don't mind 'wasting', you can find the various early-access packs over at the official store. On the other hand, if you're just interested in learning more and watching a couple of other gameplay videos, the official website is the place you seek.