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Score-unlocked packet appearances are here! Earn campaign score to unlock Copper Packet, Orbit, Prism, and Protocol Master. Choose your appearance from the new Appearances screen—cosmetics never affect gameplay or spend score.
Route the signal, outsmart hazards, and return the ACK before time runs out.
ACK: Return Protocol is a fast, tactical puzzle game about building a safe signal route under pressure. Guide the packet through a shifting network, steer around firewalls and interference fields, secure the target, then bring the ACK safely back to the core. Every run demands quick decisions and clean path planning: • Swipe to queue turns and redirect your route • Avoid blockers, scan zones, and changing network hazards • Secure relays before the transmission window closes • Retrace the route to complete the return protocol • Chase higher scores and unlock achievements The network changes. Keep the signal alive.