Modern Warfare Reference...
	Various Steam Achievements...
	Zelda and Dr. Who References...

In the mission "Atlas Falls," you'll breach a recreational room. There, you should see an arcade machine called Call of Duty: Modern Warfare.

Achievement	How to unlock
All or nothing	Gather the troops. (Complete "All or Nothing" on any difficulty).
Atlas Falls	Distract the Federation Fleet. (Complete "Atlas Falls" on any difficulty).
Audiophile	Collect all 18 Rorke files.
Birds of Prey	Capture Rorke (Complete "Birds of Prey" on any difficulty).
Blimey O'Riley	Pounce on 10 enemies whilst controlling Riley.
Brave New World	Rendez-vous in Fort Santa Monica. (Complete "Brave New World" on any difficulty).
Burn Baby Burn	Destroy 80 fuel containers.
Carbon Faceprint	Catch the photocopier with your face.
Clockwork	Hack the system (Complete "Clockwork" on any difficulty).
Cog in the machine	Kill 5 enemies without being detected before infiltrating Black Zone.
David & Goliath	Take down the LCS on the first go.
Deep Freeze	Drop 8 vehicles into ice holes.
End of the Line	Storm the factory (Complete "End of the Line" on any difficulty).
End of your rope	Cut a grappling hook rope with an enemy on it.
Federation Day	Gather intel on Rorke. (Complete "Federation Day" on any difficulty).
Fly-by-wire	Take out 3 out of 3 helicopters with the remote missile.
Ghost Stories	Escape. (Complete "Ghost Stories" on any difficulty).
Go Ugly Early	A-10 strafe 50 enemies.
Grindin'	Blow the pressure valves on your first attempt.
Homecoming	Defend LA. (Complete "Homecoming" on any difficulty).
Into the Deep	Destroy the enemy ship (Complete "Into The Deep" on any difficulty).
It Came from Below!	Kill 6 enemies with the knife while underwater in "Legends Never Die".
Jack-pot	Destroy 21 slot machines.
Jungle Ghosts	Finish the mission without breaking stealth.
Legends Never Die	Hunt down Almagro. (Complete "Legends Never Die" on any difficulty).
Liberty Wall	Take down both attack helicopters in Brave New World.
Loki	Commandeer the enemy space station. (Complete "Loki" on any difficulty).
No Man's Land	Make it to San Diego. (Complete "No Man's Land" on any difficulty).
Piece of cake	Storm the common room and kill everyone without taking damage on Veteran.
Severed Ties	Destroy the Federation's satellite array. (Complete "Severed Ties" on any difficulty).
Sin City	Plan your next move. (Complete "Sin City" on any difficulty).
Sleeping Beauty	Kill sleeping enemy in face down rappel section.
Spatial Awareness	Kill your first enemy in the Call of Duty Ghosts campaign.
Struck Down	Find Ajax. (Complete "Struck Down" on any difficulty).
The Ghost Killer	Confront Rorke (Complete "The Ghost Killer" on any difficulty).
The Hunted	Make it out alive (Complete "The Hunted" on any difficulty).
They look like ants	Destroy all enemy ground targets and kill no allies with the rods.
Tickets please	Shoot the grapple guys off the side of the train.
Waste Not	Every shot with the remote sniper kills a person or vehicle.
You've earned it	Earn the mask. Finish the campaign on Veteran.

In the mission Stuck Down, there are some trophies in the locker room. One is shaped like a rupee and reads "Most bushes cut and pots smashed." Another trophy is shaped like a Tardis and reads "Smallest exterior with the largest interior." You can find these same trophies elsewhere in the game, as well.