Rec Room's Circuits V2 rewrites its multiplayer scripting system, moving away from the memory-intensive V1 approach. V1 synchronized thousands of individual game objects per scripting element, causing CPU and memory bottlenecks that capped complexity. Circuits V2 solves this by treating the entire system as a single game object, using a Redux-inspired state container where all changes are actions processed by a reducer function. This centralizes networking logic, replacing bespoke RPCs with a single RPC method.

The system uses protocol buffers for action serialization and a "action funnel" to manage peer-to-peer synchronization, ensuring serializable isolation and preventing race conditions.