As King Arthur II: The Role-playing Wargame rallies for launch on PC next week, pre-orders have opened with the tantalising offer of a bonus prologue chapter. If you pre-order from Steam, though, you can download and play 'Dead Legions' straight away.

The Dead Legions chapter shows "the chronicle of how the greatest adversary of King Arthur came into power," involving "ghost legions" of Roman soldiers and the secrets of Hadrian's Wall. Fantasy stuff about England and old things and history, then.

You can pre-order King Arthur II from several digital distributors, but only Steam will let you play Dead Legions now. Otherwise, you'll need to wait until the game launches on January 10.

Here are the Dead Legions on the march: