In Gotham Knights, you play as Nightwing, Batgirl, Robin or Red Hood. Each provides slight differences in play styles and skills, but overall, they are very similar. The characters all have a grappling hook to fly through the sky and reach the top of tall buildings, and access to the Batcycle.
Playing through each of the four main characters provides an achievement and a feel for how each operates. One gameplay aspect Gotham Knights does well is that experiences and levels are shared among all characters. If you get Batgirl to level five and decide to switch to Nightwing, he will have the same skill points to update.
Once you choose a character, you start a night of patrol. The criminals of Gotham are everywhere, and terrorizing residents. Take them down and earn experience. Interrogate small time crooks to find out about bigger premeditated crimes happening within the city. You also run into some of Gotham’s more notorious criminals throughout your night. Harley Quinn, Mr. Freeze and others are on alert with Batman gone.
Early in the game, you need to explore the city using your grappling hook and motorcycle. In a big open world like Gotham, this can quickly become annoying when you have to travel to the opposite side of the map. Eventually you can unlock fast travel, which makes navigating the city much easier.
As your character levels up, you unlock new perks to battle the bad guys. For example, Robin can create an exploding decoy that can take out the enemies. Each character initially has three skill trees they can add experience points into, but can unlock a fourth by completing the Knighthood challenge mission. Whie skill points are earned by each character, the Knighthood challenge needs to be done separately by each, even though the missions are the same.
Enemy fights throughout the city that are initially fun quickly become repetitive. While the enemies become more difficult as you level up, the premeditated crimes are often the same crime at the same place night after night. After a few patrols, you can almost create a checkbox of where you will need to go in a night.