Games like Northgard: Ratatoskr, Clan of the Squirrel

If you finished Northgard: Ratatoskr, Clan of the Squirrel, the closest matches are Ashes of the Singularity, Cosmoteer: Starship Architect & Commander, Space Rogue, Bronze Age and The Archotek Project. All 7 share its indie genre and are ranked by how closely their themes and modes overlap.