Boosterus Extremius

Appearance
It is just like a Booster except there's an extra cannon at the back. The front cannon is also slightly longer. It upgrades directly from Booster at level 60.

Strategy
Strong against: Smasher and its upgrades, tanks with low Bullet Speed.

Weak against: tanks with high damage per bullet, fast moving tanks, high DPS tanks when trying to ram.

AS THE BOOSTERUS EXTREMIUS

 * Don't upgrade Movement Speed even if you're trying to do a ram build. With the recoil on its back cannons it'll most certainly go into an uncontrollable overdrive with maxed-out Movement Speed.
 * Flipfiring (flipping the cannons on the back of the tank and firing at the enemy before flipping back so your back cannons aren't frontside-back) is advisable but if you take it too far and stay frontside-back for a long time the recoil of the back cannons will push you away.
 * It doesn't have Fighter's good defense but it's at least faster. It is a good idea to upgrade Max Health to make up for its low defense.
 * It's terrible at long ranged combat because it'll catch up with its bullets when you fire for a long time. Upgrade more Bullet Speed.
 * If you find an enemy try to go round and round around it. The back cannons would push you fast enough to surround the enemy. Also, you can surround the enemy with bullets from your cannons.

AGAINST THE BOOSTERUS EXTREMIUS

 * Don't ram. Engage in long ranged combat with Sniper and its branches.
 * If Octo Barrage existed it would be good to use it against Boosterus Extremius. Octo Barrage's high Bullet Penetration will be able to pierce through Boosterus Extremius's bullets.
 * It is weak against drones so use Overseer and its branches to effortlessly defeat it.
 * It is even weaker against traps since it can't avoid them easily, especially when it's pursuing an enemy. Use Overtrapper for a combination of drones and traps.
 * Don't use ram tanks like Smasher, even its upgrades. It will get outgunned, outmaneuvered and outsmashed.
 * In a 1v1 standoff don't run. It'll catch up to you. Instead try to stand and fight and dodge when it tries to ram. Move left and right to stack bullets to form a wall.
 * Don't use slow-moving tanks.

Trivia

 * This is actually just Booster with an extra cannon at the back.
 * It is better to use this to ram, much like how you would do with Booster.

Code for Fantasy Tank Builder
32*circle*#3ca4cb*#555555*4/12/0/0.9/0/0/40[{"angle":0,"xoffset":0,"yoffset":0,"width":25,"baselength":75,"length":75,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,7.5,360],"damage":65,"comment":""}, {"angle":225,"xoffset":0,"yoffset":0,"width":25,"baselength":65,"length":65,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,6.5,360],"damage":65,"comment":""}, {"angle":142.5,"xoffset":0,"yoffset":0,"width":25,"baselength":65,"length":65,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,6.5,360],"damage":65,"comment":""}, {"angle":202.5,"xoffset":0,"yoffset":0,"width":25,"baselength":75,"length":75,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,7.5,360],"damage":65,"comment":""}, {"angle":165,"xoffset":0,"yoffset":0,"width":25,"baselength":75,"length":75,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,7.5,360],"damage":65,"comment":""}, {"angle":182.34567395855822,"xoffset":0,"yoffset":0,"width":25,"baselength":85,"length":85,"basereload":120,"reload":0,"basedelay":0,"delay":0,"delayed":true,"hasKnockBack":true,"type":0,"knockback":0,"disabled":true,"spread":0,"image":"rectangle","color":"#888888","bulletColor":"#ffffff","b":[12.5,8.5,360],"damage":65,"comment":""}]