This is the main box containing the core rulebook for "Mutant", a classic Swedish role playing game set in a post-apocalyptic future, where technology has reverted to pre-industrial revolution levels. Mutant men and animals, psi-mutants, as well as the occasional derelict robots share the Earth with the descendants of ordinary humans. It's based on the Basic Role Playing System.
The setting is not very detailed, but is based upon Scandinavia. Most people live as peasants, but there are larger cities and states, and of course the "Förbjudna zoner" (Forbidden zones) where radiation levels are still high and valuable lost technology can be found.
The box contains the Rulebook, an introductory scenario: "Uppdrag i Mos Mosel" (Mission in Mos Mosel), a couple of character sheets and charts, as well as a set of dice.