Post
Speedruns executed by two or more players working in perfect sync, often using partner-specific tricks unavailable to solo runners.
Co-op speedruns require a second layer of skill: communication and synchronization. The fastest Portal 2 co-op runs involve split-second body-launches, mid-air catches, and item-drop handoffs that take hundreds of hours to master as a duo. Partners often develop voice cues and hand signals that non-runners find incomprehensible. The category adds relational pressure — a single mistake ruins both PBs.
Example
Portal 2 co-op is the most famous co-op speedrun category, with top runs well under 80 minutes. Halo Legendary All Mission co-op runs are staples at GDQ marathons. It Takes Two and A Way Out have growing co-op speedrun communities. Left 4 Dead 2 features heavily in four-player speedruns.
Why it matters
Co-op speedruns are among the most watchable speedrun categories because the coordination is visible and dramatic. They also demonstrate how the discipline extends beyond individual mastery into high-trust partnerships.
Related concepts