Rosetta Protocol formulas in Once Human are usually found by looting containers and checking special crate locations, and some players also get them from shop/formula sources or by disassembling extra formulas into fragments. The most consistently mentioned farm spots are the Blackfell Fallen Zone / Blackfell Oil Fields route and other dense loot areas with lots of chests, drawers, and dumpsters.

Where to look

  • Loot containers in high-density areas. Blueprints/formulas can drop from chests, drawers, dumpsters, and similar containers.
  • Blackfell Fallen Zone / Blackfell Oil Fields. This is repeatedly highlighted as one of the best farming routes for furniture formulas.
  • Mystical crates and special routes. Some guides recommend farming mystical crates, then disassembling duplicate formulas for fragments.
  • Shop or seasonal sources. One guide notes that the other way to obtain furniture or print formulas is through the shop.

For Rosetta-specific formulas

  • A Rosetta Storage Crate formula guide points players to a dedicated Rosetta formula source rather than random general loot.
  • The in-game item entry also describes Rosetta Storage Crate Formula as a learnable formula item.

Fastest practical route

  1. Farm loot-heavy POIs, especially Blackfell Fallen Zone.
  1. Open every container you can find, including cabinets, dumpsters, and crates.
  1. Save duplicate formulas and disassemble them at the Designer’s Workstation for fragments.
  1. Use those fragments to roll or unlock new formulas.

If you meant the Rosetta Storage Crate Formula specifically, the best answer is: farm the Rosetta-related crate source shown in the formula guide, then use general formula farming and fragment disassembly to fill out the rest of your collection.