abadox
Abadox (アバドックス, Aba-do-kku-su) is a science fictionvideo game for the Famicom, subtitled "The Deadly Inner War" that was developed by Natsume and released by Nintendo during 1989 in Japan and in the USA a year later.
It is a side-scrolling shoot 'em up in the vein of Gradius and R-Type.
The game is notable for its unique visual design -as the game takes place inside the intestinal tract of a giant alien organism- as well as for its extreme difficulty.