2v2.io is a fast-paced 3D multiplayer battle royale that fuses real-time shooting with on-the-fly building mechanics. You drop into a shrinking arena as a two-player squad, scavenge wood and metal from the environment, and instantly throw up walls, ramps, and roofs mid-firefight to block enemy fire, claim high ground, or reposition — all without interrupting combat. Developed by Legion, the studio behind Kour.io, Poxel.io, and Growden.io, it distills the build-and-shoot formula into short, competitive matches where cover matters as much as aim. Controls are tight: WASD or arrow keys to move, left click to shoot, right click to toggle aim/build mode, R to reload, spacebar to jump, Z/X/C to place walls/ramps/roofs, G to edit builds, and 1-0 to swap weapon slots. The arena constantly shrinks to force engagements, so positioning and teamwork — coordinating cover fire, pushes, and builds with your squadmate — decide who survives. Built on Unity WebGL, it runs straight from the browser with no downloads or signups, and offers unlockable skins for customization. Whether you're a casual player or a tactical shooter fan, the split-second decision of when to build versus when to shoot keeps every round tense and surprisingly deep.