The full list of achievements for Call of Duty: Ghosts have leaked online, appearing to out unannounced game modes Safeguard and Extinction.

While there's no description for either mode, Extinction appears to be a challenge-based mode that sees players scavenging items and escaping from particular locations. Safeguard, meanwhile, sounds similar to Modern Warfare's wave-based Spec Ops mode.

Take a look at the full list below, but be aware of spoilers.

Ghost Stories: Escape. (Complete "Ghost Stories" on any difficulty.) - 5

Spatial Awareness: Kill your first enemy in the Call of Duty Ghosts campaign. - 10

Brave New World: Rendez-vous in Fort Santa Monica. (Complete "Brave New World" on any difficulty.) - 10

Liberty Wall: Take down both attack helicopters in Brave New World. - 10

No Man's Land: Make it to San Diego. (Complete "No Man's Land" on any difficulty.) - 10

Blimey O'Riley: Pounce on 10 enemies whilst controlling Riley. - 10

Struck Down: Find Ajax. (Complete "Struck Down" on any difficulty.) - 10

Waste Not: Every shot with the remote sniper kills a person or vehicle. - 10

Homecoming: Defend LA. (Complete "Homecoming" on any difficulty.) - 10

Go Ugly Early: A-10 strafe 50 enemies. - 10

Legends Never Die: Hunt Down Almagro. (Complete "Legends Never Die" on any difficulty.) - 10

It Came from Below!: Kill 6 enemies with the knife while underwater in "Legends Never Die". - 10

Federation Day: Gather intel on Rorke. (Complete "Federation Day" on any difficulty.) - 10

Sleeping Beauty: Kill sleeping enemy in face down rappel section. - 10

Carbon Faceprint: Catch the photocopier with your face. - 10

Birds of Prey: Capture Rorke (Complete "Birds of Prey" on any difficulty.) - 10

Burn Baby Burn: - Destroy 80 fuel containers. - 25

The Hunted: Make it out alive (Complete "The Hunted" on any difficult.) - 25

Jungle Ghosts: Finish the mission without breaking stealth. - 25

Clockwork: Hack the system (Complete "Clockwork" on any difficulty.) - 25

Deep Freeze: Drop 8 vehicles into ice holes. - 25

Atlas Falls: Distract the Federation Fleet. (Complete "Atlas Falls" on any difficulty.) - 25

Grindin': Blow the pressure valves on your first attempt. - 40

Piece of cake: Storm the common room and kill everyone without taking damage on Veteran. - 100

Into the Deep: Destroy the enemy ship (Complete "Into The Deep" on any difficulty.) - 20

David & Goliath: Take down the LCS on the first go. - 20

End of the Line: Storm the factory (Complete "End of the Line" on any difficulty.) - 20

Cog in the machine: Kill 5 enemies without being detected before infiltrating Black Zone. - 35

Sin City: Plan your next move. (Complete "Sin City" on any difficulty.) - 20

Jack-pot: Destroy 21 slot machines. - 20

All or nothing: Gather the troops. (Complete "All of Nothing" on any difficulty.) - 20

End of your rope: Cut a grappling hook rope with an enemy on it. - 20

Severed Ties: Destroy the Federation's satellite array. (Complete "Severed Ties" on any difficulty.) - 20

Fly-by-wire: Take out 3 out of 3 helicopters with the remote missile. - 20

Loki: Commandeer the enemy space station. (Complete "Loki" on any difficulty.) - 20

They look like ants: Destroy all enemy ground targets and kill no allies with the rods. - 20

The Ghost Killer: Confront Rorke (Complete "The Ghost Killer" on any difficulty.) - 20

Tickets please: Shoot the grapple guys off the side of the train. - 20

Audiophile: Collect all 18 Rorke files. - 15

No Man Left: Escape with all four players - 20

Sprinter: Reach the exfil chopper with 1 minute and 30 seconds or more remaining on the clock. - 20

Made it Out Alive: Escape 1st time - 20

Completionist: Complete all Extinction challenges and escape. - 25

Cabin Fever: Make it to the cabin. - 10

City Dweller: Made it to the city. - 20

Any Means Necessary: Get 50 kills with the electric fence and fire traps in a single game. - 40

Trash Picker: Scavenge 40 items in a single game - 20

Throttled Escape: Escape using a relic - 10

Safeguard: Reach round 20 in Safeguard - 20

You've earned it: Earn the mask. Finish the campaign on Veteran. - 40