TSR made extensive use of mock-up cover images for catalogs and advertising over the years.

In the 1992 Spring/Summer Catalog, TSR used a mock-up image for Gamma World, 4th edition.

Gamma World 4th mock cover 1992 Catalog



Mock-up vs Final Covers: Gamma World, 4th Edition.


See Also:

Aliens and the Cryptic Alliances (GAMMA WORLD)

Aftermath RPG box set – early Phoenix Games edition

Gamma World colored map

Original Gamma World maps

Gamma World: Damaged inside the shrinkwrap