- "Chirper is the hip new communication method for all Gamindustrimen! Formally called The Chirper Tree, unique Gamipics (avatars) chirp about whatever's on their mind. Each nation has their own Branch of the Chirper Tree. If you check it actively, you may hear a variety of tips and information."—Official English website of Hyperdimension Neptunia mk2
Chirper is a method of communication that makes its first appearance in Hyperdimension Neptunia mk2. The player can interact with avatars called "Gamipics" that are each unique in their own specific nation. If a Gamipic's chat bubble contains the Event symbol, continuous interaction with the Gamipic will trigger events that may reward the player with new skills or items.
- Chirper is a reference to the popular social networking site, Twitter.