First of all, it's just so accessible. It's quick and easy to learn, you don't need hours to play it and with just ten figures per side you can set up a warband and be ready to go with very little expenditure. If you've already got a bunch of 28mm fantasy or medieval miniatures from other games then you're pretty much ready to go. Small groups means a lot less time collecting and painting, and just getting on with the game.
The game also has a brilliant, enigmatic setting that's great for a roleplaying campaign. This is from the 'Frostgrave – Tales of the Frozen City' short story collection blurb:
"Long ago, the great city of Felstad sat at the centre of a magical empire. Its towering spires, labyrinthine catacombs and immense libraries were the wonder of the age, and potions, scrolls and mystical items of all descriptions poured from its workshops.
Then, one cataclysmic night, a mistake was made. In some lofty tower or dark chamber, a foolish wizard unleashed a magic too powerful to control. A storm rose up, an epic blizzard that swallowed the city whole, burying it deep and leaving the empire as nothing more than a vast, frozen wasteland. The empire shattered, and the magic of the world faded. As the centuries came and went, Felstad passed from history to legend and on into myth. Only a few wizards, clinging to the last remnants of magical knowledge, still believed that the lost city had ever actually existed. But their faith was rewarded.
After a thousand years, the fell winter has passed. The snows have receded, and Felstad has been uncovered. Its buildings lie in ruins, overrun by undead creatures and magical constructs, the legacy of the empire's experiments. It is an evil, dangerous place. To the few hardy souls who inhabit the nearby villages, the city has acquired a new name, ‘Frostgrave', and it is shunned by all right-thinking people. For those who seek power and riches, however, it is an unparalleled opportunity, a deadly maze concealing secrets of knowledge long forgotten..."
How awesome is that? How is that not screaming out for some incredible dungeon-delving, ruin-searching, crazy madcap magical gonzo insane exploration escapades? The actual Frostgrave game and system can be easily converted into a quick and easy RPG, so that you can game your way through the city and still have those wargame sessions you love so much. I added a basic skill roll, which is simply roll 1D20 and beat a target number; easy 5, average 10, difficult 15, impossible 20. That's it - instant roleplaying game.
The enigmatic setting is also open to interpretation, as the author Joseph A. McCullough has purposefully left the setting and history vague. This means you can add all kinds of monsters, races and personalities and just go crazy with the city. High fantasy bad-guy blasting? No worries. Gritty medieval dungeon grinding? Take your best shot. Frostgrave welcomes all kinds of approaches, and there's almost nothing you can't do - the Frostgrave Facebook page is proof of that.
This a great game and a great place to adventure, and even though the wargame gives you a chance to create some real personalities and get attached to the magician you've created, it really deserves a dedicated roleplaying game to really get into the meat of the setting.