Secret Objective

[Nyarl]

There's one in Chimera mission 10 - you can capture the Thors in the top right corner of the map, there's two of them and they are not defended. They get free payloads every couple of minutes (that got fixed in the patch .573). Fire one at the Cartel base and get the achievement "Wrath of Wotan".

[killer00100]

Added Cartel's 3th mission secret.

[Cruelty]

Found 2 more secrets in the 7th Chimera mission! When the Cartel starts sending superweapons your way, have Anteys intercept 2 weapons to get the Iron Dome achievement!

And then the much, much harder one, Survive for another 30 mins after you got the objective to retreat! (Best way to do this is to be very offensive with Rhino's and Puma's with the rocket upgrade, and a ninja to spot for turrets. Go straight north and kill the Thor launch stations, and youre safe (This is extremely difficult and should only be attempted with expert knowledge on the game and up to par mechanics)

gl hf!

[killer00100]

Add Chimera mission 5 secret.

[Seekerdolls]

Cartel mission 5

Eliminate northeast and northwest US main base within time limit(can't remember actual time limit)

[Cruelty]

Cartel mission 5

Eliminate northeast and northwest US main base within time limit(can't remember actual time limit)

Yes you have 45 mins to do that to get "the best defense" achievement. Also, if you kill all B2 bombers before they drop their bombs, you get the achievement "The best airforce in the world" gl hf!

[Araxus]

And then the much, much harder one, Survive for another 30 mins after you got the objective to retreat! (Best way to do this is to be very offensive with Rhino's and Puma's with the rocket upgrade, and a ninja to spot for turrets. Go straight north and kill the Thor launch stations, and youre safe (This is extremely difficult and should only be attempted with expert knowledge on the game and up to par mechanics)

I can confirm this one.
Managed to eliminate those Thor launchers and just waited for additional ~30 mins before sending 3 Anteys to the extraction zone. Got the "Where is my Umbrella"-Achievement (direct translation form German, dont know how exactly they named it in english) and finished the mission with 100%.

[AlphaKilo]

Mission 7 (2 secrets, 1 confirmed)
- Survive for 30 mins after receive retreat order (still not confirm).

This might just be it.

Where is my umbrella? - (Into the Chimera's Lair) A rain of fire from the sky is not enough for you to retreat

got this too after capturing NE base and destroying the rest. I needed well over 30 min.

[Araton]

Mission 7 (2 secrets, 1 confirmed)
- Survive for 30 mins after receive retreat order (still not confirm).

This might just be it.

Where is my umbrella? - (Into the Chimera's Lair) A rain of fire from the sky is not enough for you to retreat

got this too after capturing NE base and destroying the rest. I needed well over 30 min.

I destroyed all buildings and units of the Cartel on that map. Took a couple of hours. Still no Achievement.

[killer00100]

Mission 7 (2 secrets, 1 confirmed)
- Survive for 30 mins after receive retreat order (still not confirm).

This might just be it.

Where is my umbrella? - (Into the Chimera's Lair) A rain of fire from the sky is not enough for you to retreat

got this too after capturing NE base and destroying the rest. I needed well over 30 min.

I destroyed all buildings and units of the Cartel on that map. Took a couple of hours. Still no Achievement.

Me too (but only about hour). Not sure why. If possible, I would like to ask for one who can complete this achievement to post video how to do it.