The List of "Hidden" Campaign Objectives.

All of the hidden objectives for the UEF, the Cybran, and the Illuminate campaigns

The UEF objectives

•Survivor - Mission 1 / Survive the initial wave of Cybran attackers without losing any units.
•Economic Opportunist - Mission 2 / Build at least two Mass Extractors in enemy territory.
•Master of the Seas - Mission 3 / Build an Atlantis II Experimental Aircraft Carrier.
•Brutal Conqueror - Mission 4 / Defeat Coleman without the aid of the Fatboys.
•Experimenter - Mission 5 / Build at least four Experimental units
•None Shall Pass! - Mission 6 / Prevent any enemy King Kriptors from crossing the main fortress bridge.
•Nuke King - Mission 6 / Launch your first nuke.

The Illuminate objectives

•Blockhead - Mission 1 / Prevent the blockade from taking more than 25% damage.
•Master Tactician - Mission 2 / Complete the operation by constructing fewer than 30 mobile units.
•Not the Bees! - Mission 3 / Take out the enemy air defenses.
•Pro Anti-Air - Mission 3 / Take out the prison's defensive structures.
•Agent Provocateur - Mission 3 / Capture all of the Security Stations.
•Experimental Fanatic - Mission 4 / Build at least eight Experimental units.
•Supremest Commander - Mission 5 / Max out your commanders rank.
•A Czar is Born - Mission 6 / Build your first Darkenoid,
•♥♥♥ Lord - Mission 6 / Complete the operation with an army made up entirely of Assault Bots (you cannot build any other type of units).

The Cybran objectives

•Survival Expert - Mission 1 / Survive Gauge's onslaught after the download completes.
•Master Thief - Mission 2 / Capture a Rogue Engineer.
•Great Escapist - Mission 2 / Complete the operation without a unit being captured by the enemy.
•Cache and Carry - Mission 3 / Collect all of the Technology Caches.
•Sultan of Soul - Mission 4 / Build at least four Soul Ripper Experimentals.
•Master of the Deep - Mission 5 / Build a Kraken Experimental Submarine.
•Master of Pawns - Mission 6 / Win the operation without the aid of any Experimentals.
•Research Savant - Mission 6 / Complete all available research.

Tips From Helpful People

Dr. Krieger says:
For "♥♥♥ Lord" (Mission 6 / Complete the operation with an army made up entirely of Assault Bots): To clarify, you can build the following units/structures: Assault ♥♥♥, Land Factory (with add-ons), mass extractors, energy generators, and research stations. I am unsure if you can build engineers as I never had to, though supposedly you can. You'll start off with several engineers, 2 anti-air units (it's okay to use these, just don't build any more of them!), and like 8-10 assault bots.

Sir Cookiemon says:
Note on "Brutal Conqueror" - all you have to do is simply NOT capture Bravo and Charlie. The FatBoys mkII from your own factory don't count towards the completion of this objective (if so it would lterally be unachievable - I tried).
Just pump out a hundred or so gunships and get the Heavy Shield and HP/Dmg research, fly in, let it rip.

DeathXIII says:
hey, mind adding extra description for "♥♥♥ lord"? There are some different version of requirement on the internet, but the safest way seems to be build nothing except :
land factories(no addon), assault bots, energy generator, research lab, mass converter/extractor. Because i can confirm building defensive structures will ruin it.

Lynx says:
you can use this site to see what you miss in each mission http://supcom2.wikia.com/wiki/Campaign
And this:
@luckz
yeah you can find out what you have finished, there's a file named Game.prefs in you SC2 save folder (not sure where it is, I'm using GSM) so you'll have to look it up
anyways, inside that file there's the list of everything, just dig in and you'll find it
try and search campaign and you'll see it...
gluck

Alphahex had this to say:
For "None Shall Pass!" (Mission 6) use AC1000 and upgrade training. They are so tanky that you don't even need to bring fighters to protect them. I seriously took out the 3 king kriptors, all 3 relays and the core with 10 AC1Ks that took like 10-15 minutes to build (with mass conversion).

Hello, King Kriptor here, I found this gem:
http://steamcommunity.com/sharedfiles/filedetails/?id=297504710
This guy gives VERY helpful tips. Go check it out.

Clutch:
For "Survival Expert" (Cybran mission 1), the Protobrain Complex must remain standing. Otherwise, the mission won't fail (the download has already completed), but you won't get the achievement

[aldjamthegreat136]

i have almost finished mission 6 of cybran campaign

[we]

I need this also for the "know-it-all" achievement please

[Lucas]

supreme comander 2 hard mission 6 cbybran final

[Blackpot]

Very good, thank you

[IlluminATeam]

For "Survival Expert" (Cybran mission 1), the Protobrain Complex must remain standing. Otherwise, the mission won't fail (the download has already completed), but you won't get the achievement.

[Alphahex]

For "None Shall Pass!" (Mission 6) use AC1000 and upgrade training. They are so tanky that you don't even need to bring fighters to protect them. I seriously took out the 3 king kriptors, all 3 relays and the core with 10 AC1Ks that took like 10-15 minutes to build (with mass conversion).

[Roknikus]

For "Bot Lord" (Mission 6 / Complete the operation with an army made up entirely of Assault Bots): To clarify, you can build the following units/structures: Assault Bot, Land Factory (with add-ons), mass extractors, energy generators, and research stations. I am unsure if you can build engineers as I never had to, though supposedly you can. You'll start off with several engineers, 2 anti-air units (it's okay to use these, just don't build any more of them!), and like 8-10 assault bots.

[Sir Cookiemon]

Note on "Brutal Conqueror" - all you have to do is simply NOT capture Bravo and Charlie. The FatBoys mkII from your own factory don't count towards the completion of this objective (if so it would lterally be unachievable - I tried).

Just pump out a hundred or so gunships and get the Heavy Shield and HP/Dmg research, fly in, let it rip.

[Selsun [Danger Dolphin]]

needs "" around hidden

[Amelix]

Deadpool i just built 6-7 megaliths and totally rekt everything and captured the objective :)