A set of new videos have been edited together to demonstrate the skills available in each class. The Templar videos covering the abilities of the Blademaster and Guardian were included in the "loot bag" given to all participants of Tuesday's Community Day. This one includes the skill icon and name next to it being executed. The Hunter video, singular, detailing the Marksman and Engineer was released just now and serves as more of a montage of sample skills.

Before Flagship Studios, there was Blizzard North. Originally known as Condor, the Redwood-based studio was acquired in 1997 by Blizzard Entertainment. At the time, Blizzard North was hard at work on the development of the game that would be the cornerstone of everything that came after: Diablo.

IGN : Remember Hellgate: London? The dark fantasy action role-playing game came out in 2007 for PC, a year before developer Flagship Studios went bankrupt. Since then, various free-to-play and online revivals have come and gone. Now, 17 years after the release of Hellgate: London, it’s back.
I remember some friends and I all bought Hellgate: London day one because it was made by some original Diablo devs. We had fun playing it, good memories.

PC Invasion: Hellgate: London is back on Steam, but it's not what you expect it to be. It's a single-player game in the vein of Asian MMOs.
Looks good. Although I have seen better footage of this game.