The Incredible Hulk

Destroy the Jupiter sector and you've won this achievement.
Just like the other 3 achievement you have to let them reach level 3 in research. After that you get a mission where you have to defeat the base. When you did that the Jupiter boss appears and simply defeat him. After that the achievement pops.
This can be done after you've completed the storyline. It may take some time when the mission to destroy the building appears. I suggest you do something else to pass the time and check every 20-30 minutes. Good luck.

-GLITCH WARNING-
The game has glitched sometimes where if you don't destroy 25 assault groups overall they will stop appearing and you wont be able to continue with the story to get the 5 achievements.

You can check how many assault groups you have destroyed in the stats page.

Please take your time to destroy 25 assault groups before you destroy each base on phase one or continuing the story to much. Any mission passed after the Bi beast without 25 assault groups destroyed it might glitch out.

STEPS NEEDED TO TAKE TO TAKE DOWN A SECTOR
1.Each sector has 3 phases you must go through.
2.Each sector has a progress bar that needs to be filled up.
(you can check your progress bar in the missions page enclave)
3.You can fill up the sector by destroying the assault group that is attacking the city or replaying an earlier phase.
4. After the bar is full wait around the city and wait for it to talk about the enclave group has finished their weapon or w/e it says. and the waypoint will pop up for that city.
Keep doing steps 1 - 4 for each enclave sector.