Slay.one is a multiplayer arena shooter with well-made pixel art graphics set in a post-apocalyptic world. It features four different game modes such as 'deathmatch', where everyone fights against each other, 'zombie deathmatch', which is just like deathmatch but with zombies as an additional threat. And also the modes 'capture the flag' in which you fight against the opposing team and 'team deathmatch', simple team play and zombies. You start out with a single weapon that can fire one shot per click, but don't worry there are many more weapons to be found, such as snipers, shotguns and laser guns that you can collect while playing. It also features special abilities like laser turrets, a heal aura and many more to unlock. The games biggest strengths are both its vast content and the very good quality, making it one of the best io games out there.
First you need to choose a game mode at the bottom right in the game menu. Then you can also choose different skins. When in the game, move around with W, A, S, D, left click to fire your weapon and right click to jump forwards. Once you collected a new weapon you can swap them by scrolling your mouse wheel. Many weapons can be found at the center of the map so fight your way to there.