Surviv.io is a nicely designed survival game. Start with the game when you have nothing and start learning how to loot weapons. Beat other players to get their stuff.
Movement: W, A, S, D
Aim: Mouse
Melee/shoot: Left-click
Change weapons: 1 through 4 or scroll wheel
Stow weapons(Melee mode): 3 or E
Swap to previous weapon: Q
Switch gun slots: T or drag gun to another slot
Reload: R
Scope zoom: Left-Click on zoom
Pickup/loot/revive: F
Use medical item: Left-click on item or 7 through 0
Drop item: Right-click on item
Cancel action: X
View map: M or G
Toggle minimap: V
Use team ping wheel: Hold C, then hold right-click and drag the mouse, then release right-click
Use emote wheel: Hold right-click and drag the mouse, then release right-click