inFAMOUS: First Light is a standalone game based on inFAMOUS: Second Son, similar to how inFAMOUS: Festival of Blood was based on inFAMOUS 2. Unlike Festival of Blood however, First Light is not entirely separate from the main game. The protagonist in this third-person action game is Abigail ‘Fetch’ Walker, an NPC in the original game. In Second Son she was introduced as a conduit / bioterrorist with neon powers that are absorbed by the protagonist Delsin Rowe. She is introduced as a vigilante who hunts down drug dealers to kill them, because she accidentally killed her own brother following heroin withdrawal. During the events of Second Son she eventually becomes an ally of Rowe.
The events of First Light are set before Second Son. Seven years after the conduits and their powers emerge, the Department of Unified Protection establishes Curdun Cay, a prison created to contain the conduits and their powers. The game starts with Fetch locked up an interrogated by Brooke Augustine. She is asked to tell the events that led to her imprisonment, which are then played as a flashbacks with portions of the game returning to the present. The story focuses largely on the discovery of her powers and the wrong people her brother Brent Walker was involved with, especially the small-time drug lord Shane.
The game contains new environments, such as the Curdun Cay prison and the snowy mountainside surrounding it. Players also get to revisit Seattle and most of the game is set in the first half of it (from the original game). There are various missions to complete involving fighting, platform challenges, and spraying graffiti, to earn upgrade points. Fetch has access to only one of the four power sets of Second Son: super speed through neon. It is immediately unlocked in full, providing endless speed for instance. There are some changes to its use. By running through pink clouds in the city a speed boost is achieved and combat has been extended with finishers for melee strikes and neon homing missiles.
In the present Fetch needs to complete three arena challenges in a small, enclosed environment for Augustine, fighting against waves holographic enemies and rescuing hostages. By completing these skill points are earned to upgrade abilities through an extensive skill tree. When a savegame of Second Son is detected, these can also be played as Delsin Rowe. The best performances are compared on worldwide leaderboards. A new type of enemy, the Demon, is exclusive to the arena challenges. The game includes a photo mode to capture and share screenshots.