Iron Harvest: Operation Eagle is a real-time strategy expansion that adds a new faction, air combat mechanics, and a dedicated campaign to the dieselpunk mech battles of the base game. Set in the 1920+ alternate history, it expands the conflict with Usonian forces entering the fray after staying neutral during the Great War.
Gameplay
The core loop centers on resource management, unit production, and large-scale engagements involving infantry squads, armored mechs, and now aerial units. Players gather iron and oil to construct bases and deploy forces across varied terrain. Each faction maintains distinct unit rosters and hero characters that provide unique abilities and playstyles. The addition of air units introduces vertical movement and new tactical layers, allowing strikes from above while requiring dedicated anti-air defenses to counter threats. Paratroopers can deploy behind lines for surprise attacks, and airships range from fast scouts to heavily armed capital vessels. Usonia brings over thirty new units including specialized infantry, mechs, and structures that emphasize economic strength and versatile firepower.
Game Modes
Operation Eagle features a standalone campaign consisting of seven missions that can be played solo or cooperatively with another player. These missions include new voice-acted cinematics and introduce fresh allies and adversaries tied to the Usonian storyline. Beyond the campaign, the expansion integrates with the base game's skirmish and multiplayer options, where the new faction and air units become available for custom matches and competitive play. Challenges and map editor tools from the original title remain accessible for additional replayability.
New Faction and Mechanics
Usonia represents an industrial powerhouse with advanced technology suited to both defensive setups and aggressive pushes. Its hero units, such as Admiral Mason commanding a massive airship, highlight the faction's aerial focus. All existing factions receive air unit options and corresponding countermeasures, forcing adjustments in army composition and positioning. These changes encourage experimentation with combined arms tactics that blend ground forces with sky support.
Is It Worth Playing?
Operation Eagle delivers meaningful additions for fans of real-time strategy games who enjoy mech combat and alternate-history settings. The new campaign provides focused single-player and co-op content with substantial narrative elements. Player reception on Steam stands at Mostly Positive based on hundreds of reviews, with praise directed at the Usonia faction design and the strategic impact of air units. The expansion builds directly on the established systems without overhauling them, making it a solid choice for those who already appreciate the base experience or seek deeper faction variety and updated battlefield dynamics. Those new to the series may want to start with the core game to fully appreciate the added layers.
