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[Video] How to Complete all the optional mission objectives! The Mandatory Option Trophy


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Destroy All Humans How to Complete all the optional mission objectives!  The Mandatory Option Trophy

 

Timestamps in the Spoiler Tags

Spoiler

Mission Completion 100%
[0:25] M1 - Destination Earth
1. Drown a cow in the lake
2. Kill the farmer's wife using a chicken

[1:34] M2 - Earth Women Are Delicious
1. Escort Miss Rockwell posing as the Mayor
2. Destroy buildings with the Abduct-O-Beam

[3:26] M3 - Citizen Crypto
1. Kill a scientist using an explosive cow
2. Scan humans at the Gathering

[4:07] M4 - Alien Pool Party
1. Drown Party-goers
2. Destroy Police cars

[5:16]  M5 - Televisions Of Doom
1. Destroy the car using explosives
2. Drown Sleepy Ernst in the ocean
3. Don't touch the ground 

[7:42] M6 - Aliens Stole My Brain Stem
1. Use the Anal Probe on humans

[8:33] M7 - This Island Suburbia
1. Destroy Army assets

[9:12] M8 - Teenage Zombies From Outer Space
1. Kill a cop with an agent
2. Kill an agent with a cop

[10:00] M9 - South By Southwest
1. Destroy a car using a human
2. Kill Agents with Ion Detonator
3. Destroy a building with a Majestic agent

[12:05] M10 - Foreign Correspondent
1. Get all hints from the Crackpot
2. Reach Bert Whither undetected
3. Kill several soldiers using explosives

[15:50] M11 - Suburb Of The Damned
1. Kill soldiers using explosive barrels
2. Kill soldiers using rockets
3. Kill soldiers using grenades

[17:31] M12 - Whatever Happened To Crypto 136?
1. Extract some human brains
2. Kill a bunch of humans

[18:54] M13 - The Mutant Menace
1. Reach the lab without being detected
2. Trash the lab
3. Destroy buildings using Sonic Boom

[21:44] M13.5 - The Wrong Stuff
1. Drop a crate onto a scientist
2. Lure a scientist into a minefield
3. Cause a BBQ accident

[22:58] M14 - Duck And Cover
1. Kill soldiers using cows
2. Kill soldiers using rocks
3. Kill soldiers using landmines
4. Kill soldiers using rockets

[26:07] M15 - It's A Wonderful Armageddon
1. Destroy a gun turret
2. Destroy a SAM launcher
3. Destroy military defense structures

[27:58] M16 - Furon Down!
1. Take on a human disguise
2. Drown Majestic Agents

[29:53] M17 - Mr. Crypto Goes To Capitol City
1. Reach the Octagon undetected
2. Kill Soldiers using explosives

[32:31] M18 - Armquist VS. The Furons
1. Sabotage Majestic listening posts
2. Collect ammo spawning during the fight

[35:01] M19 - The Lone Gunman
1. Don't alert the Police
2. Drown soldiers 
3. Kill the president with an explosion

[38:25] M20 - The Furon Filibuster
1. Collect senatorial craniums
2. Kill Senators using explosions

[40:32] M21 - Shocking Developments
1. Electrocute Scientists with Tesla Coils
2. Kill Tesla Coil inventors

[43:08] M22 - Attack Of The 50-Foot President!
1. Hit the weak spot on Robo-Prez' chest
2. Shoot Silhouette out of the air

 

Edited by DaivRules
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3 hours ago, legoman1326 said:

Do you need to complete the mission or can you return to the mothership after getting the objective on a replay?

Need to complete the mission to have it save the objective completion. 

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  • 2 weeks later...

Do these all need to be done at the same time, I’ve finished the game and cleaning up the missions but a few I am missing 1 or 2 out of 3 bonus objectives. Do I need to complete all in a single attempt of the mission or can I replay and just get what I missed 

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7 minutes ago, djcawood said:

Do these all need to be done at the same time, I’ve finished the game and cleaning up the missions but a few I am missing 1 or 2 out of 3 bonus objectives. Do I need to complete all in a single attempt of the mission or can I replay and just get what I missed 

No, you can mop them up with Chapter Select but only need to get the ones you're missing so don't have to bother redoing the ones you got the first time around :).

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  • 5 months later...

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