Snake mechanics

Tron Light Cycles

 * Armagetron Advanced (2001)

Slither.io (2016)

 * http://slither.io/

Other

 * Nibbler (1982)????
 * Gomola Speed (1990)
 * Mu-cade (2006)
 * https://www.pippinbarr.com/games/artgame/ArtGame.html