Infamous: First Light is a DLC standalone title that explores the origin story of Abigail "Fetch" Walker, a character that was a part of the story in Infamous: Second Son. As such, it will adopt some of the same basic gameplay elements from that title, including its mission structure and overall powers lineup. However, it will differ in that Fetch only has access to one power, so her powers will be different and there will be some new additions.
General Gameplay
At its core, First Light will be an open world game with a mission-based structure, similar to Second Son. Players will be able to explore the areas of the game, like Curden Cay and even Seattle at some point during the story. It isn't clear exactly how large the game's world will be, though, as it will likely be smaller than Second Son's world.

The game will have main story missions, as well as side missions and even collectibles. These side missions and collectibles come in the form of helping people who are being held hostage, special races Fetch can compete in, and her own version of the Blast Shards from previous games, called Lumens.
Powers
In Second Son, Delsin Rowe had access to many different kinds of powers, which he "borrowed" from other Conduits, including Fetch. However, Fetch only has access to a single kind of power, Neon. While there might be some similarities between the two, Fetch's abilities will be her own and so both characters won't play the exact same.

Fetch can shoot Neon blasts from her hand, much like Delsin, as well as run around at a high speed. There are also neon gas clouds strewn around the world that allow Fetch to maintain the speed and momentum when traveling, much like the satellite dishes and smoke stacks from Second Son.
There is a upgrade page that can be accessed, where Fetch can acquire new abilities for each of her powers, which are unlocked as you progress in the story. In order to purchase these upgrades, you will need Skill Points (SP), which can be gotten by grabbing the collectibles, finishing side missions and fulfilling the various Challenges.
Her powers will be split into eight different skills, which are listed below.
- Drain Neon
- Neon Bolt
- Light Speed
- Melee
- Laser Focus
- Stasis Blast
- Homing Missile
- Neon Singularity
Battle Arenas
New to the game will be battle arenas, which will pit Fetch against increasingly difficult waves of enemies. These arenas will be based in Curden Cay and more will become available as you progress in the main story. There are two types of Battle Arenas, Rescue and Survival. Rescue entails Fetch having to save hostages before they are killed by enemies, while Survival will just have Fetch keep fighting until she is defeated.
You will be scored on how well you do, and these scores can be uploaded to a leaderboard on Playstation Network. In addition, players who have a save file from Second Son will be able to play as Delsin in these battle arenas.
Challenges
Challenges are in-game achievements that Fetch can do that will award her with Skill Points. These can range from killing a certain kind of enemy so many times, to defeating an enemy with a specific power. There are general Challenges, as well as those that are specific to certain parts of the game, like Battle Arenas.