Cobra

DOSGames.com Review:  Rating: 3.5
Cobra is a snake / Nibbles like game with CGA graphics and a gradual progression in difficulty which introduces new challenges as you progress. As usual for these kinds of games, your primary goal is to avoid crashing into the walls, your own tail (which grows as you collect bonuses) and other obstacles. If you survive long enough, you'll progress to the next level. The first level starts out simply, but later levels introduce new obstacles like death skulls and enemy snakes. I'm not sure what speed it's supposed to run at exactly, so 1,800 cycles in DOSBox is my best guess. Not a bad obscure early release from the creators of the well-known CD-Man Pac-Man clone.