Diep.io

Diep.io (stylized as diep.io) is a multiplayer browser game created by Brazilian developer Matheus Valadares in 2016. It is also the inspiration for Arras.io. Miniclip first published the mobile version. In Diep.io, players control tanks in a two-dimensional arena. They earn experience points and upgrades by destroying shapes and other tanks.

Valadares created the similar Agar.io in 2015. Its viral popularity inspired a genre of similar browser games with simple gameplay and graphics called ".io games", which includes Diep.io. Diep.io was praised for its upgrade system, which gave it more depth and replay value than other ".io games". In 2021, it was acquired by Addicting Games. Google Play reports over 10 million mobile downloads as of 2023.