Quadral Square

The Quadral Square is a Sentry that is exclusively spawned in the Square Sanctuary.

Design
It has a yellow square body and four auto turrets on the sides.

Technical
The Quadral Square has four mounted auto turrets, which have decent firepower (for a sentry).

Spawning
Two Quadral Squares spawn with the Square Sanctuary.

Strategy
There are usually four Quadral Squares that spawn with the Square Sanctuary. Try to get them apart and kill them one by one. It shouldn't be too difficult, as they are usually spawned far apart. Quadral Squares can overwhelm you with pure firepower if you attack them all at once. High DPS tanks or bullet spammers are recommended to take them down.

Trivia

 * The Quadral Square has pretty high firepower for a sentry and is the only sentry which can fight more than one enemy at the same time.
 * The Quadral Square doesn't appear on the changelog.
 * The Quadral Square is the only Sentry that is based on a polygon.
 * The Quadral Square drastically increases its size when it kills something.