Our boy Phil Millar, chief SJW, has written a comprehensive piece on Frostgrave
Just what the hell is Frostgrave anyway?
It’s a Fantasy Skirmish Wargame, it’s also the name given to the now frozen ruins of the great city of Felstad, where a magical incident long ago left has left it empty and frozen over. The ice is thawing and so the great treasures and knowledge of the city is once more there for the taking. Most sensible people avoid the haunted ruins of Frostgrave, stalked as it is by monsters, demons and more. You, however, are not most people, you’re a wizard and wizards crave one thing above all else; power, something Frostgrave has in abundance, if you’re willing to risk it.
So, you gather your grimoires, bring your apprentice (if you have one) and hire a gang of misfits and thugs to join you in seeking out the treasures of Frostgrave. There, in packed and close confines of the city, you’ll fight off other wizards, wandering beasts roaming the city and all manner of other creatures and evils. As you fight, you’ll discover more spells and gain more power, find wondrous magic items and treasures beyond counting but that just means the stakes get higher.