Trailmakers: Airborne Expansion, developed by Flashbulb Games, spins Trailmakers toward aerial combat and rescue missions. The expansion adds a mission-based campaign set in Chirpo, plus aircraft-focused construction, NPC dogfights, and a large world designed for vertical flight. Key additions include more than 75 flight and combat parts, NPC enemies, and online co-op for the full campaign. It targets sandbox builders and flight fans seeking structured objectives within a physics-driven world.

Aerial sandbox reorients the core build-and-fly loop

The expansion turns vehicle construction toward aircraft, asking players to design functional flyers to complete mission objectives. Players build craft from the game's physics-based blocks, then use those machines to engage Robot Pirate enemies and rescue Chirpo villagers across a large, vertical map called Chirpo. This shifts the emphasis from ground vehicles to sustained aerial control, making construction and flight the central gameplay loop.

Co-op campaign and combat mechanics change team play

Online co-op support covers the entire campaign, so friends can build and fly together in mission scenarios. Combat introduces NPC dogfighters and flak cannons, plus auto-aiming weapon options and functional armaments. The expansion also supplies a "build-on-the-fly" mechanic for rapid in-mission repairs, and the addition of over 75 new blocks gives teams concrete tools for aerodynamic design and weapons integration.

Environment design favors vertical navigation and exploration

Chirpo is the largest map in Trailmakers history, composed of floating islands and vertical biomes that emphasize altitude and maneuvering. Level geometry encourages climbing, diving, and arena-style encounters rather than flat circuit racing. Advanced flight mechanics support these layouts, and NPC interactions populate the world with both friendly Chirpo villagers and hostile Robot Pirate patrols, creating objective-driven encounters across varied terrain.

Progression and challenge reward iterative builders

The mission-based structure adds clear goals and introduces NPC-driven quests for the first time in the series, so progression comes through mission completion rather than open-ended sandbox play alone. Community feedback notes the increased complexity of constructing reliable aircraft, which makes the expansion better suited to players who enjoy iterative design and experimental tuning. The campaign format encourages replaying missions to refine builds and tactics.

Best for builders who like tinkering and co-op aerial challenges

Trailmakers: Airborne Expansion is a rewarding choice for players who enjoy hands-on vehicle design and cooperative aerial encounters; it requires the original Trailmakers base game and runs on Windowsbit) with about 8 GB of available storage. Newcomers should expect a steeper technical learning curve noted by the community. For owners of the base game, this expansion offers focused objectives and extended creative goals.