OSR Commentary On CM4 Earthshaker! By David 'Zeb' Cook & Adventurer Conqueror, King 1st edition Rpg

 " Into your hands has been thrust a great responsibility: the management of a growing domain. It has been a hard winter. Now, with the coming of spring, the populace looks to you for leadership. It will take a careful and generous hand to restore your subjects' confidence."

"But even as you hold your first courts of the new season, an ominous shadow falls across the land. Earthshaker - wonder of the world - has arrived! Will its arrival be a curse or a blessing? With bold action and skillful diplomacy, you may yet divert disaster. But if you fail, the consequences will certainly be the subject of many a minstrel's tragic songs for years to come!"

CM4 Earthshaker! By David 'Zeb' Cook features the Earthshaker and this means that levels 18-20 are not levels to be trifled with. This is a 'King' level adventure in every sense of the word with a dungeon/menace that is the size of a domain and can flatten one. CM4 features some very high level encounters a high level module with Conqueror to King level encounters we're talking table X (10) encounters. And Earthshaker is a return to both Blackmoor and S3 Expediation to the Barrier Peaks Science Fantasy turf because the Earthshaker is described as follows; " the Earthshaker is described thus: "[It] was built at least 3,000 years ago, probably by a race of evil gods similar in skill to dwarves or gnomes." Since Blackmoor is set 3000 years before the modern day of the Known World, and since its science-fantasy technology is sometimes said to come from "gods," many presume that Blackmoor is the source of the Earthshaker technology." 
And for Adventurer, Conqueror, King's Dwarven Craftmen PC's and NPC's the Earthshaker technology is a return to form. Studying it can yield incredible innovations. And this is a return to form with Autarch's By This Axe: The Cyclopedia of Dwarven Civilization.

 CM4 is a return to menaces that are both the menace and partially the dungeon in one neat package. And make no mistake there are monsters, encounters, menaces that can end a party with a quick snap of a finger. And there are not one but three domains up for conquest according to the CM4 Earthshaker wiki entry; "Expanding the Known World. In case players don't have their own dominion, "Earthshaker!" offers up the dominion of Vyolstagrad for use. It also mentions the nearby dominion of Stamtral. Both are located in Norwold, but as was the case with the Barony of Twolakes Vale in CM2: "Death's Ride," the adventure doesn't specify where exactly. The Italian MMB suggests placing Vyolstagrad southeast of the Azure Lake.

Vyolstragard also marked the first use of a Russian-like culture in Norwold. It's since been associated with the "Vatski" culture."  So this makes adventuring interesting from an ACK's perspective. The players can really make Mystara thier own setting by taming it if they survive! The dungeon crawls are cleverly woven into this one. 
And once again if there was ever a high level adventure that clocks in on the ACK's ten and above level CM4 Earthshaker is it! This adventure has the ACK's Heroic Fantasy Handbook written all over it! 

Deadly encounters, high level politics, a kingdom wrecking warmachine, and more! CM4 Earth shaker can pick up right after the events of  Sabre River (CM3) By Douglas Niles Along With  Bruce Nesmith. In Earthshaker the PC's are the heroes & kings of yore returned to the shores of Mystara especially with ACK's in the campaign wheel house. And now with Adventurer Conqueror King System Imperial Imprint (ACKS II) - Kickstarter happening. Now is the perfect time to get into an ACK's Mystara campaign.