Bosses

Bosses are large AI-controlled enemies in Diep.io. They usually require more than one player to take down due to their annoying tendencies and strength. Bosses can be found in any game mode, and can enter bases in Team Modes without the harm from Protectors (except for the Fallen bosses). They supply large amounts of experience points to the player who destroys it (30,000 XP).

Spawning and Behavior
A boss will spawn 10 minutes after the server's start, and 15-20 minutes after the death of the last boss. Only 1 boss can spawn and be active at a time. To prevent unfair deaths, the developers made it so that bosses do not target tanks under level 15 unless provoked first. The game sends a notification to all players at the top of the screen when a boss.

When a boss is killed, another notification is shown, reading: "*boss* has been killed by *player name*". An example would be: "The Summoner has been killed by [Example] Example".

Current Bosses
As of right now there are 5 total bosses in the game:
 * Guardian
 * Summoner
 * Defender
 * Fallen Booster
 * Fallen Overlord

Trivia
Which boss gives you most trouble? Guardian Summoner Defender Fallen Booster Fallen Overlord
 * Formerly:
 * Before 24th August, the bosses were not targeted by the Base Protectors.
 * Before 22th August, several bosses could be around simultaneously.
 * Before 22th August, when a boss spawns, there were no Spawn Notifications.
 * Before 22th August, the bosses could target the shapes and players below level 15.
 * The first AI boss, the Guardian was added in a secret update that wasn't mentioned in the changelog on August 17th.
 * More bosses were secretly being added on the next, and the following day. Even more were added later.
 * So far, all Bosses use Drones to kill players.
 * In the notifications added to the game to show when a boss has spawned, the Guardian is labelled as, "The Guardian of the Pentagons". This is due in part to it being the Crasher based boss, which have long defended the Pentagon Nest.
 * When an arena is closed, and a boss spawns after everyone has been killed off, the boss will be killed off by an Arena Closer. However, its name does not display and only shows "an unnamed tank".