Thematically, the Mumbad cycle explores another place, this time the sprawling Mumbad metropolis in India. The city is currently holding an election where a key issue is clone rights - are they property or people?
The Mumbad cycle also introduces a pair of new mechanics that alter deck building rules.
Runners get consumer-grade hardware and some event cards that have a special deck limit of 6 copies (6 copies are included of each card in their data pack). These cards all have cumulative power growth as you install or play more copies of them in a game.
Corporations get alliance cards, each of which have a special condition that when met reduces their influence cost to zero.