Here is the full list of all 46 Five Nations achievements.
Win a skirmish game with Federation.
Win a 1vs1 skirmish game in normal mode playing as Athrael.
Win a 1vs1 skirmish game in normal mode playing as Sylon.
Win a 1vs1 skirmish game in normal mode playing as Thorun.
Win a 1vs1 Skirmish game in Normal mode playing as Zhogarn.
Win a 1vs1 Skirmish game in Deathmatch mode playing as Federation
Win a 1vs1 Skirmish game in Deathmatch mode playing as Athrael
Win a 1vs1 Skirmish game in Deathmatch mode playing as Sylon
Win a 1vs1 Skirmish game in Deathmatch mode playing as Thorun
Win a 1vs1 Skirmish game in Deathmatch mode playing as Zhogarn
Create a squadron of 18 Hurricanes in Chapter 1 Mission 1 - "Distress Call".
Destroy a Fusion Reactor without destroying any of the KEIKO Sentries in Chapter 1 Mission 2 - "The Cavalry has Arrived".
One Pasteur unit must survive the Chapter 1 Mission 3 - "Bear Rock".
Find all units willing to join you in Chapter 1 Mission 4 - "Point Custer".
Create a fleet of 10 Hailstorms in Chapter 1 Mission 5 - "Convoys to Salvation".
Beat the Chapter 1 Mission 6 - "The Bargain" in under 15 minutes.
Deploy a new Command Station in Chapter 1 Mission 7 - "Siege Breakers".
Kill at least 20 units with Nuclear Missiles in Chapter 1 Mission 8 - "Operation Gaugamela".
Destroy 1 Wormhole Generator in under 4 minutes in Chapter 1 Mission 9 - "Blackout".
Use the Gathering as a living shield so its shield goes below 40 during Chapter 1 Mission 10 - "Daedalus".
Wither 8 of the Green player's buildings by destroying the Helias providing them with energy during Chapter 1 Mission 11 - "Into the Unknown".
Destroy 20 units or buildings using Martyr Probes in Chapter 1 Mission 13 - "Strange Liberators".
The hero Adikara must destroy at least 40 units or buildings in Chapter 1 Mission 14 - "The Assault".
Destroy all the production buildings of the Federation player in Chapter 1 Mission 15 - "Shadows of the Past".
Destroy the Sylon base in the north and create an expansion there that includes a Command Center and Mining Station in Chapter 1 Mission 16 - "Revenge".
Construct a defense line of 8 Polaron Spheres in Chapter 1 Mission 12 - "Fury of the Beasts".
Research all Ship Upgrades at the Transponder in Chapter 2 Mission 1 - "The Birth of a New Praetor".
Find the 3 hidden Support Centers in Chapter 2 Mission 2 - "Exodus".
Control a sortie of 8 Glooms and research all of their Offensive Server upgrades in Chapter 2 Mission 3 - "Inventorying".
Destroy the Plasmoids around the Obelisks in Chapter 2 Mission 4 - "Race Against Time".
Create a group of 4 assimilated Flankers in Chapter 2 Mission 5 - "Regression".
Don’t lose any units besides Martyrprobes and Warpgliders in Chapter 2 Mission 6 - "False Flag."
Find the Zoners filled with resources in Chapter 2 Mission 7 - "Purge."
Destroy the Psychic Dome without producing any units in Chapter 2 Mission 8 - "War-Path."
Form a demolition squad of 5 Grinders and research their Platinum Alloy upgrade at the Anvil in Chapter 2 Mission 9 - "Battle of Morael".
Find all bonus units in Chapter 2 Mission 10 - "Skull Bearer"
Kill at least 20 units with the Quasar Flare spell in Chapter 2 Mission 11 - "Crushing Allies".
Build a fleet of 8 Flagships and research their upgrade Antiproton Dampener at the Senate in Chapter 2 Mission 12 - "Death Blow".
Collect 4 assimilated Orcas in Chapter 2 Mission 13 - "Prisoner".
Recall at least 15 enemy units using the Praetors' spell in Chapter 2 Mission 14 - "The Artifact".
Build two Ion Cannons with a captured Thorun Welder in Chapter 2 Mission 15 - "Deliverance".
Cast the Blind spell 30 times on enemy units in Chapter 2 Mission 16 - "A New Beginning".
Complete Prologue Mission 1 - "Operation Broad Jump" in under 3 minutes.
Build up to 8 Trinity class ships in Prologue Mission 2 - "Home too Far"
Build a defensive line of at least 6 KEIKO Sentries in Prologue Mission 3 - "Pandora"
Bring the Pandora cargo ship to the Athrael base within the first 3 minutes of Prologue Mission 4 - "The Deal"