Titanfall: Frontline was a game for iOS and Android devices published by Nexon and developed by Particle City, announced in late 2016, but cancelled in early 2017. The game was to be a card game revolving around decks of Burn Cards similar to Hearthstone and The Elder Scrolls: Legends. Trying to access the website now simply shows a cancellation message. The Twitter account has also been shut down.
Many of the game's assets would go on to be repurposed for the next mobile game, Titanfall: Assault.
The gameplay was originally going to offer card-based real-time gameplay where players could call in all manner of units to play.