Arkham City is an open world action video game that incorporates
elements of stealth and predator tactics. All of the gadgets previously
obtained in the first game are present at the start of Arkham City (with
the exception of the Ultra Batclaw, which is replaced with the regular
Batclaw and Sonic Batarangs). Most of them have improved or new
capabilities; for example, the Cryptographic Sequencer can also track
signals, the line launcher now has a feature that allows Batman to flip
over and launch another zipline perpendicularly across, switching
directions, the remote control Batarang now has a built in brake and
boost, and the grappling gun can now be used while gliding to boost
Batman further up into the air. Four additional gadgets have been
revealed: smoke pellets to confuse armed enemies when spotted by them,
the Remote Electrical Charge which is a sniper-like tser gun used to
power generators and shock enemies, ice grenades used to freeze enemies
and make pathways through water, and a balled rope for tying up enemies.
The game incorporates more puzzle elements; the use of Batman's
"Detective Mode", which highlights elements such as enemy skeletons and
clues on-screen, is used to perform forensic activities such as tracing
the origin of a sniper round.