All Challenges

Fight for the Lost

Challenge Type Difficulty Map Enemy Characters and weapons
Week 3.2 Friendly Competition
Duo Gold, Platinum Vancouver
Cerberus
Week 4.3 Koinon Quarion
Trio Gold, Platinum London
Geth
Week 5.3 Erinys
Trio Gold, Platinum Dagger
Cerberus
Week 9.3 Anabasis
Trio Gold, Platinum Ghost
Collectors

Outlier Solo Series

Challenge Type Difficulty Map Enemy Characters and weapons
s1 Deception of Menae
Solo Gold Condor
Collectors
s6 Archangel, Immortal
Solo Gold Rio
Cerberus

N7 Triune Trials

Challenge Type Difficulty Map Enemy Characters and weapons
N6.1 Garrus' Calibrations Part 2 - Archangel (Trio)
Trio Gold, Platinum Vancouver
Reapers
N6.2 Next of Kin (Trio)
Trio Gold, Platinum Dagger
Collectors
N6.3 Ash (Trio)
Trio Gold, Platinum Hydra
Cerberus

Project Blackwatch

Challenge Type Difficulty Map Enemy Characters and weapons
Duo Mission 1 Marksman Raid
Duo Silver, Gold, Platinum Glacier
Geth
Duo Mission 3 Legacy
Duo Silver, Gold, Platinum Rio
Reapers
Trio Mission 1 Decibel
Trio Gold, Platinum London
Geth
Team Mission 1 Special-Op Reinforcements
Team Gold, Platinum Condor
Reapers
Team Mission 2 Cyone's Eternal Defense
Team Gold, Platinum Reactor
Collectors
Team Mission 3 Infiltration is Imperative
Team Gold, Platinum Hydra
Cerberus

Servant of the People

Challenge Type Difficulty Map Enemy Characters and weapons
Duo 3 Deadly Precision
Duo Gold, Platinum Rio
Geth

Kirrahe Airlines

Challenge Type Difficulty Map Enemy Characters and weapons
Flight 2 Disaster Protocol Training
Duo Gold, Platinum Rio
Collectors

Themed Duo Challenges 1

Challenge Type Difficulty Map Enemy Characters and weapons
Set 4.I Eden Prime
Duo Silver, Gold, Platinum Dagger
Geth
Set 7-8.IV Huerta's Archangels
Duo Silver, Gold, Platinum Vancouver
Collectors

For Tuchanka

Challenge Type Difficulty Map Enemy Characters and weapons
Trio Challenge III Family Armor
Trio Gold, Platinum Glacier
Cerberus
Team Challenge III Virmire
Team Gold, Platinum Jade
Geth
Team Challenge IV Hammer Task Group
Team Gold, Platinum London
Reapers

Weekly Themed Solos 1

Challenge Type Difficulty Map Enemy Characters and weapons
Week 20 Garrus' Calibrations Part 1 - C-Sec (Veteran-Insanity-Legendary)
Solo Silver, Gold, Platinum Hydra
Geth

N7 Challenge Series

Challenge Type Difficulty Map Enemy Characters and weapons
N6.1 Garrus' Calibrations Part 2 - Archangel
This challenge has other variants
Solo Silver, Gold, Platinum Vancouver
Reapers

The Compact

Challenge Type Difficulty Map Enemy Characters and weapons
Duo 4 Huerta's Archangels (The Compact)
Duo Gold, Platinum Vancouver
Collectors

Omega on Fire

Challenge Type Difficulty Map Enemy Characters and weapons
Team III Mercenary Sniper Assassins
Team Gold, Platinum Giant (Hazard)
Cerberus

Weekly Themed Solos 2

Challenge Type Difficulty Map Enemy Characters and weapons
Week 2 Purgatory's Revenant
Solo Silver, Gold, Platinum Ghost
Cerberus

Themed Duo Challenges 2

Challenge Type Difficulty Map Enemy Characters and weapons
Set 6, II Shadow of A Kabalim
Duo Silver, Gold, Platinum Condor
Reapers
Set 7, I Turians
Duo Silver, Gold, Platinum Ghost
Geth

Operation Supernova

Challenge Type Difficulty Map Enemy Characters and weapons
Trio V TheTechnoTurians
Trio Gold, Platinum Condor
Reapers

Tales from the Trenches

Challenge Type Difficulty Map Enemy Characters and weapons
Week 2.1 You won't see our backs until we are dead
Duo Gold, Platinum Condor
Reapers