obsidian

Fans also got a preview of Avowed - an expansive fantasy role-playing game from US developer Obsidian, which is due for release in February next year.

One gem is thought to be a rare, 2nd Century head of the Greek hero Hercules made from obsidian, a type of volcanic glass.

We plodded through an obsidian darkness, one deliberate step at a time, our headlamp beams illuminating the way.

And it comes in four newly named colors: obsidian, porcelain, bay and aloe.

Holly said that particular feature was brought over from games such as Grounded - a co-operative survival adventure from Microsoft studio Obsidian.