Complete The Archive on any difficulty.

Complete The Renegade on any difficulty.

Complete The Void's Edge on any difficulty.

Complete The Algorithm on any difficulty.

Overthrow the aliens at any difficulty level

Create the Commander's Avatar

Completely upgrade a beam weapon with superior grade weapon upgrades

Build a radio relay on every continent

Kill an Avatar

Kill 3 enemies in a single turn, with a single soldier, without explosives

Kill a Sectopod on the same turn you encounter it (in Single Player)

Upgrade a facility