Planet Crafter Official

: Many advanced building "pieces," specialized furniture, and interior walls are unlocked by finding and decoding blueprint microchips found in shipwrecks . 🗺️ Story & Lore Items

: High-tier machinery and specific decorative pieces require finding rare parts like circuit boards located in procedural wrecks . Planet Crafter

: During late-game exploration, you will need to find ancient "pieces" or keys left behind by a lost civilization to unlock secret areas and alternate endings . : Many advanced building "pieces

If you are looking for construction and base pieces, structures in the game are highly modular . They are locked behind progress walls: " specialized furniture

If you are looking for a literal "missing piece" or quest item: