Coke Zero released the first-ever location-based video game. Download LiveCycle to your iPhone and the real world became the Grid: your GPS drew Light Trails behind you as you moved, so you could trap rivals, derezz opponents, and stay one turn ahead of being derezzed yourself. You didn't play the light cycle. You were the bike.

A movie tie-in usually means a can with a logo on it. That wasn't enough for a film built on the fantasy of being pulled inside a game. Coke Zero's own story — real taste, zero calories, two worlds in one sip — gave us permission to do something bigger: collapse the wall between the real world and the Grid, and put people on the bike.

Using your phone's GPS, LiveCycle tracked how you actually moved through the world and drew a glowing Light Trail behind you on the map. Walk, run or ride and you laid down a wall; box in another player or an AI opponent and you derezzed them, all while dodging their trails and your own. Single battles, group battles, badges and a leaderboard turned a city block into an arena, with a "scan your TRON can" hook and exclusive TRON: Legacy content pulling the movie and the drink into the same game.

LiveCycle put a real-life game of TRON in people's pockets weeks before the film hit theaters, tying a soft drink to one of the year's biggest releases through play instead of a placement. The app is long retired, but it's still remembered as an early pioneer in merging real-world geography with augmented-reality-style gaming, years before that became an industry.