QBasic Nibbles (1990) [PC] [MS DOS]
QBasic Nibbles is game released by Microsoft in 1990, written for QBasic that came with some versions of MS-DOS operating system.
Nibbles is a game for one or two players. Object of the games navigate your snakes around the game board trying to eat up numbers while avoiding running into walls or other snakes. The more numbers you eat up, the more points you gain in the longer your snake becomes.
In 2001 the game was also ported to NES, watch the NES version here:
http://youtu.be/KuLPRQMBFTg