Aside from his distinctive cowl, Batman’s most iconic costume element is his utility belt. As the world’s greatest detective, Batman has to take a variety of gadgets and gizmos to investigate scenes and solve crimes. And while he does lurk in the shadows, the Dark Knight doesn’t shy away from battle—requiring specialized equipment to help level the playing field when surrounded by nameless goons or supervillians.

Bruce Wayne rotates out the contents of his utility belt depending on what circumstances require, but here are some of Batman’s most commonly used gizmos, and which games they’ve appeared in, too. We don't know which, if any, of these Batman will be bringing along to Arkham City, but we can speculate the possibilities by examining his most consistent contraptions.

Bat-cuffs
Once Batman’s temporarily incapacitated a thug, it makes sense to make more of a long-term commitment. Bat-cuffs are slipped onto a bad guy’s hands, where they have to be cut off by authorities. They’re kind of like the disposable plastic hand restraints used by police during large-scale operations, though these are made of diamond-encrusted nylon and steel.
Featured In: Batman: Dark Tomorrow

First Aid Kit
Sometimes you get hurt in the field and there’s no time to get back to the Batcave. To be fair, this is probably a problem specific to Batman. Using the medicines and tools in his first-aid kit, Bats can temporarily patch himself up before heading back home. In games, being able to restore health is critical, for obvious reasons.
Featured In: Batman: Vengeance, Batman: Dark Tomorrow

Batarangs
The Batarang is Batman’s bread and butter. The bat-shaped projectile is typically thrown by hand, though how it behaves afterward can vary wildly. Sometimes they come back like boomerangs. Other time, Batarangs take one-way trips on their way to stun or disarm enemies. It’s also one of the most common items in Batman’s video-game toolbelt, appearing in nearly every game he’s been in.
Featured In: Batman, Batman: The Caped Crusader, LEGO Batman, Batman: Return of the Joker, Batman: The Animated Series, Batman Begins, Batman: Rise of Sin Tzu, Batman: Vengeance, Batman: Chaos in Gotham, Batman: Dark Tomorrow, Batman: Arkham Asylum, The Adventures of Batman & Robin, Batman Returns

Batlight
It’s a flashlight. There’s not much else to this gadget, though it’s pretty handy to have around.
Featured In: Batman: Dark Tomorrow, The Adventures of Batman & Robin

Bat Goo Gun
This device does what it sounds like; it fires a blast of sticky goo to contain Batman’s foes. Insert joke here. (Don’t confuse this with the Arkham Asylum’s explosive gel; this is just as viscous, but it doesn’t blow up.)
Featured In: Batman Forever