Gamma World. The iconic map of the former USA, 2471 AD. 3rd print map, laid over the 2nd print map.

More info at the reference site.

Gamma World for sale in the shop.

EDIT April 20, 2019

I got a 1st edition/1st print (TSR Lizard logo) set in the shop, so I took some photos comparing its map with a 2nd printing map.

At first I thought the 1st edition map’s rivers had been traced in pen by a former owner, they are so bold.

Gamma World 1st & 2nd map comparison

But that’s not the case. Note in the detail shot below, the rivers grow faint identically in the same places. Somebody tracing with a pen wouldn’t do that.

Gamma World 1st & 2nd map detail comparison

Other than color shifts, the maps have different copyright notices.

Gamma World 1st & 2nd map logos


See also: Omega War: Science Fantasy Adventure Game (1983)

Gamma World colored map