Paper.io 2, published by hyper-casual giant Voodoo, is the sequel to the original Paper.io and continues its territory-claiming formula β drawing a trail outside your claimed area and returning to it to seal off new territory, similar in spirit to classic territory games like Qix or the arcade classic Volfied, but reworked into a real-time multiplayer .io format. Voodoo built its reputation on exactly this kind of simple, instantly graspable mechanic scaled up with genuine competitive stakes.
The core tension comes from vulnerability while drawing β your trail can be cut off by a rival player before you seal your loop, instantly costing you the run β which keeps every territory-claiming attempt genuinely risky rather than purely a race against the clock.
The objective is to claim as much territory as possible while avoiding elimination by rival players, growing your controlled area to rank as high as possible on the leaderboard.
Its tense risk-and-reward territory claiming makes for genuinely addictive competitive play. GBK Games also has Hole.io for another popular Voodoo multiplayer hit.