Kour.io is a free online .io FPS developed by Legion Platforms, released in March 2024.

It stands out from other browser shooters because of its class system — each of the 13 characters carries a different primary weapon with distinct HP values, meaning class selection directly shapes how you engage in every firefight.

A 150 HP Heavy with a machine gun plays nothing like a 80 HP Recon running a Vector submachine gun, and recognizing which class suits a given map and mode is half the battle.

The game offers seven official modes ranging from Free For All and Team Deathmatch to more unusual options like MoonSnipe (low-gravity sniping) and KourSurf (surfing combined with shooting).

A built-in map editor lets players create custom arenas, and community-created modes like KourCraft expand the experience further. Progression runs on KP (Kour Points), earned through kills and missions, which unlock cosmetics, crates, and emotes.

Clan support and daily, monthly, and all-time leaderboards give long-term players a competitive ladder to chase. As an HTML5 game, it loads directly in your browser on both desktop and mobile. Move with WASD, jump with Space, and shoot with Left-click.

Aim down sights using Right-click for tighter accuracy at range. Crouch with Shift or C to reduce your profile and improve stability. Press E to dash — a short burst of lateral movement useful for dodging or closing distance.

Switch between your primary, secondary, and melee weapons with 1, 2, and 3. Press B to emote and F to inspect your weapon. The Esc key opens the pause menu. Your immediate goal in most modes is straightforward: get kills. In Free For All, the player with the most kills wins.

In Team Deathmatch, your kills contribute to your team's combined score. Hardpoint adds a territorial twist — teams fight over a control zone on the map, earning points both from kills and from occupying the zone.

Gun Game forces you through a preset sequence of weapons, advancing to the next gun with each kill. Across all modes, kills and completed missions earn KP, which feeds into your overall level and unlock progression. Class selection happens before spawning.