After level 17, ship upgrades require total of 10 artefacts per level (5 for most levels prior), slowing down upgrades significantly. There's supposedly total of 100 artefacts out there, so obviously you can't upgrade all 3 parts of the ship completely (20 levels out of 30 needed for that).
After level 17, ship upgrades require total of 10 artefacts per level (5 for most levels prior), slowing down upgrades significantly. There's supposedly total of 100 artefacts out there, so obviously you can't upgrade all 3 parts of the ship completely (20 levels out of 30 needed for that).