The early G.I. Joe line had numerous accessories that weren’t quite vehicles, but were supposed to work in conjunction with the figures, in a similar manner. Some are really only useful for display or dioramas, like the Mortar Defence or Bivouac.
There were a few that were a little more fun to play with, though to be honest “fun” isn’t a word that should actually be used with the S.N.A.K.E. armor. It’s a big grey robot looking thing, that you place over a figure, to be used as “kloaking” armor. It also came with a a rubberized endoskeleton that would make it so you didn’t have to actually waste a figure inside of it.
From a design perspective, it’s big, clunky, and grey. It fits in with a couple other little Cobra things (C.L.A.W., Flight Pod) but it’s hardly an iconic piece of COBRA hardware. While nobody is clamouring for a slightly more posable Deep Six, the S.N.A.K.E. is a thing I’ve found is decent for background action in dioramas, and having a couple kicking around, doesn’t hurt.
The S.N.A.K.E. armor is one of those things, that while the execution of it leaves a lot to be desired, it’s one of those things where it was obvious Hasbro felt COBRA needed a few more toys to balance things out, and a cheap pseudo vehicle thing worked perfectly, as it’s bigger than a figure and would appear to provide more balance to COBRA’s side because, shit they were outnumbered 3:1 in 1983.
Unlike a lot of strange small accessories, the S.N.A.K.E. armor actually did something in the Comic Book. In issue #18, it shows up as this mind control mechanized monster that apparently can’t shoot anything “COBRA Blue” as a safeguard in case someone overcomes it’s mind control powers. Kwinn the Eskimo does, of course, then he dies.
There’s a few SNAKE Armors out there, a Grey one, a Funskool one, a Red Shadows Escape Armor, a Blue repaint that’s really hard to find, and in the mid 2000s they did a Black one for one of those terrible live action G.I. Joe movies. Personally the Grey 1983 one is all I really need, though the grey plastic can yellow like a son of a bitch.