Gaia Project: The Lost Fleet is an expansion for Gaia Project, containing:

Four new factions: Darkanians, Mowyed, Space Giants, Tinkeroids, corresponding to 2 new planet types: proto planets and asteroids
New map layouts, featuring holes where the ships of the lost fleet and some new planet types will be placed
New smaller sector tiles ("interspace" and "deep space" sectors) containing the new planet types
New ships from the Lost Fleet to explore, allowing access to new action spaces, technologies, technology tiles and federation tokens. No standard Q.I.C. actions anymore - Q.I.C. actions are now only available on ships
3 new standard tech tiles and 6 new advanced tech tiles
4 new round boosters
3 new round scoring tiles
3 new final scoring tiles
Some faction balancing (start resources, income, additional actions or different costs to explore a ship); Lantids get cover up tiles for their PI (1-3 player)