Fortress

The Fortress is a Tier 4 Tank upgrading from Cruiser,  Swarming Trapper, and  Tri-Trapper at level 45.

Design
The Fortress is a Tri-Trapper with Swarm Drone spawners in between. There is 60 degrees of space between each barrel.

Technical
The Fortress shoots 3 Traps like the Tri-Trapper out of its Trap barrels. It controls a decent amount of swarm drones that follow the cursor, around the same as the Cruiser. Its FOV is the same as Cruiser.

Strangely, the Trap barrels aren't pointing at the cursor, the Swarm Drone spawners are. This drastically reduces the effectiveness of the Traps as protection since they aren't aiming forward. Not much of a Fortress if you ask me.

Upgrades from

 * Cruiser
 * Swarming Trapper
 * Tri-Trapper

As the Fortress

 * Since your traps aren't firing forwards, you're actually pretty weak there.
 * Bullet spammers could easily tear through your drones and kill you.
 * Rammers also pose quite a threat. Your swarm drones are just tickling them, especially the Bonker.
 * Do not turn Autospin on. While this does slightly improve protection, it renders your swarm drones useless since they'll just orbit around you.
 * Have Autofire on at ALL TIMES. You don't want to be caught with no protection at all by the evil, malicious, malevolent, sinister Highwayman.
 * If you're approached, quickly retreat into your traps. They'll be at your sides and back since they don't point forwards.
 * This works well against most AI for protection, but not the rammer ones.
 * Upgrade Movement Speed and Reload.
 * You can play this tank in two ways: as a Cruiser or as a Trapper.
 * If you like the Cruiser, upgrade Bullet Speed and mainly rely on your swarm drones to kill people. See Cruiser for tips on this.
 * Kill Pounder s. They are your only refuge for points, everything else, don't even think about it.
 * If you prefer Tri-Trapper, then don't upgrade Bullet Speed and use your traps for protection.
 * You can't really get the best out of both sides, since Bullet Speed makes traps useless but no speed makes swarm drones trash. Maybe just a few points...
 * In teams gamemodes, this whole *perspective* ThuliumThe69thElement has on this garbage tank changes. You are valuable for both protection and offense.

Against the Fortress

 * In FFA, this tank is literal trash. It's even worse than your school's Monday mystery meat and your mom's gross "sandwich" with the green stuff on it COMBINED.
 * BULLET SPAM SPAM SPAM SPAM SPAM *blocked for spamming the wiki*
 * Smasher.
 * Jump. Bonk. Free points.
 * The only this Fortress is strong against is the Pounder since it has low reload and can't really get away, so don't use that.
 * In Teams gamemodes, Fortress is a lot stronger. Its teammates can distract you and take cover in traps while Fortress attacks you with swarm drones.
 * The classic diep.io "crowd control" tanks like Octo-Tank can kill swarm drones.
 * Ramming still works, as long as Redistributor or Kukri fails to make an appearance. It's riskier now though!
 * Tryharding works. Pick mobile tryhard tanks like Highwayman or Descender or possibly Translator, but stay away from ThuliumThe69thElement. Deadlier than the mystery meat.
 * Of course, if Fortress picks up some anti-thulium tips and is with a tryhard tank, I wish you good luck, but it won't be enough.