I actually thought Snake and TRON were two distinct games with Snake being a 'player against environment'-game and TRON being 'player against an NPC'-game.
The TRON/Lightcycle genre is at its very best as a PvP(xN) game. Haven't logged in for years, but there used to be dozens of very active servers running Armagetron Advanced, and it looks like it's still going:
http://armagetronad.org/index.php
A very fun, fast paced, social, arcade-like gaming environment for someone not invested enough in gaming to delve into the likes of WoW or similar.