Operation: Shatterstone combines the “planetary disaster” and “alien invasion” motifs into a rollicking fun ICONS adventure. Author Dain Lybarger has populated this adventure with compelling situations, engaging NPCs, and interesting villains. Many possible plot elements and variations are included, so even novice ICONS GMs should be able to run the adventure pretty easily. The adventure would work fine as a one-shot, the beginning to a campaign, or an episode within a larger campaign. Dan Houser’s artwork lives up to the high standards he’s set in previous ICONS products. The layout mimics the layout of Great Power, but reverts to Helvetica Neue for body type, resulting in an overall less attractive presentation. Dozens of grammatical and typesetting errors and/or inconsistencies unfortunately mar the presentation. These issues aren’t significant enough to impede readers’ understanding, but they are noticeable. If DTRPG supported half stars, I’d add half a star to my rating.