dualbox

Dualbox, also known as dual-boxing or two-boxing, is a practice in which a player controls two separate game instances simultaneously, typically in online multiplayer games. It is a subset of multiboxing and is most common in MMORPGs and real-time strategy titles, where players manage two characters to coordinate actions, share resources, or automate repetitive tasks.

Setup and methods vary, but most dualbox configurations use either two separate computers or a single computer running multiple game clients in isolated windows. Input-mirroring or broadcast software routes keystrokes and mouse events to multiple clients so actions performed on a primary box are replicated on the others. Some configurations rely on virtualization or specialized hardware such as KVM switches to separate inputs and outputs.

Usage and considerations differ by community and game. Proponents cite efficiency, control, and the ability to handle two characters in tandem, while critics argue it can create unfair advantages and increase server load. Many games specify rules about automation, macros, and external software, and terms of service vary widely. Players should consult the specific game’s policies to determine what is permitted.

Variants and terminology: dual-boxing is the two-instance form of multiboxing; the broader practice may involve three or more concurrent game clients. Common tools for dual-box setups include input broadcast and window-management utilities, with examples such as ISBoxer (InnerSpace), HotkeyNet, and Octopus. Hardware approaches may involve multiple machines or KVM-enabled configurations to streamline cross-instance control.