Spore (
Steam link) Yes, the 2008 game where you guide your creature from a cell to master of the galaxy. The game has two DLCs: Creepy and Cute part pack (obvious content) and Galactic Adventures, which allow the player to create their captain and embark on adventures, which can also be modified. Uploading is also really easy since most of not all of the modifiable content is contained within an image.
Here is the full list of modifiable content:
• Cells
• Creatures (Animal [Early, Default], Sentient [Tribal, Civilized, Space, GA only: Captain]. Sentient editors cannot add, modify or remove biological parts from the Animal editors)
• Vehicles (Land, Water, Air, Space - Space has access to all parts, each of the rest have a section of exclusive parts)
• Buildings (House, City Hall, Entertainment, Factory - each have a section of exclusive parts)
• Anthems (very niche editor, only used for Civilization and Space stages)
• Adventures (GA only)
