GECK

The Garden of Eden Creation Kit or GECK was the item The Chosen One was sent to find by the Village Elder at the start of Fallout 2. It was first mentioned already in the Fallout 1 manual.

The kit looks like a smallish, silver briefcase emblazoned with the letters G.E.C.K., and contains all the seeds, fertilizer and gizmos required to revitalize areas of the wasteland. Each Vault was presumably issued with one GECK, except for Vaults 13 and 15; the Vault 15 GECK got swapped (whether by accident or some nefarious scheme) with the Vault 13 surplus water chips, leading to all sorts of problems when the one working water chip broke.