All Challenges

The Gordian Hour

Challenge Type Difficulty Map Enemy Characters and weapons
Stage 5 Acceptance
 Solo Gold Glacier
 Cerberus

For Tuchanka

Challenge Type Difficulty Map Enemy Characters and weapons
Duo Challenge IV Assassination
 Duo Gold, Platinum Ghost (Hazard)
 Cerberus

Project Blackwatch

Challenge Type Difficulty Map Enemy Characters and weapons
Solo Mission 1 Blackwatch Original
 Solo Silver, Gold, Platinum White (Hazard)
 Geth
Trio Mission 2 Silenced Banshees
 Trio Gold, Platinum Goddess
 Reapers
Team Mission 2 Cyone's Eternal Defense
 Team Gold, Platinum Reactor
 Collectors

Themed Duo Challenges 2

Challenge Type Difficulty Map Enemy Characters and weapons
Set 7, I Turians
 Duo Silver, Gold, Platinum Ghost
 Geth
Set 9, I Blue Suns
 Duo Silver, Gold, Platinum Vancouver
 Reapers

Omega on Fire

Challenge Type Difficulty Map Enemy Characters and weapons
Duo II Let's Take This Outside
 Duo Gold, Platinum Jade
 Cerberus
Trio IV Blue Suns: Operation Sandstorm
 Trio Gold, Platinum Dagger (Hazard)
 Cerberus

Weekly Themed Solos 1

Challenge Type Difficulty Map Enemy Characters and weapons
Week 5 Indoctrinated (Casual-Hardcore-Epic)
 Solo Silver, Gold, Platinum Glacier
 Geth
Week 5 Indoctrinated (Veteran-Insanity-Legendary)
 Solo Silver, Gold, Platinum Glacier
 Geth

N7 Triune Trials

Challenge Type Difficulty Map Enemy Characters and weapons
N2.5 Indoctrinated (Trio)
 Trio Gold, Platinum Glacier
 Geth

Weekly Themed Solos 2

Challenge Type Difficulty Map Enemy Characters and weapons
Bonus Challenge The Spectre
 Solo Silver, Gold, Platinum Glacier (Hazard)
 Collectors

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