Full list of all 99 DEFCON: Xenos achievements.
The base game contains 94 achievements, and there are 2 DLC packs containing 5 achievements.
Terminate 1,000 enemies.
Terminate 10,000 enemies.
Terminate 100,000 enemies.
Terminate 1,000,000 enemies.
Recruit the Mechanic.
Recruit the Gunner.
Recruit the Technician.
Recruit the Sniper.
Recruit the Engineer.
Recruit Magnus, the Gunfighter.
Unlock an additional gear slot.
Unlock all gear slots.
Terminate the Berserker.
Terminate the Demolitionist.
Complete a mission in Horde Mode.
Complete a mission in Night Mode.
Obtain Overdrive.
Obtain Barrage Fire.
Obtain Flame Grenade.
Recruit Vulcan, the Commander.
Start your first mission as Storm, the Soldier.
Recruit Neo, the Artillerist.
Reach level 80 with Neo.
Complete any mission with Neo.
Terminate Naz'Roth, the Tyrant.
Complete any urgency mission.
Complete 5 urgency missions.
Complete 25 urgency missions.
Complete 100 urgency missions.
Complete any urgency mission on Night Mode.
Terminate the 1st melee division in any urgency mission.
Terminate the 1st ranged division in any urgency mission.
Terminate the 1st boss division in any urgency mission.
Terminate Zah'Rok, the Berserker in any urgency mission.
Reach level 60 with Mace.
Complete any mission with Mace.
Recruit Mace, the Guard.
Restore a total of 1,000 health points.
Restore a total of 10,000 health points.
Restore a total of 100,000 health points.
Collect a total of 100,000 Aether.
Collect a total of 1,000,000 Aether.
Collect a total of 10,000,000 Aether.
Complete any main mission in Elite Mode.
Complete any main mission with all modes enabled.
Complete Paris with all modes enabled.
Complete Berlin with all modes enabled.
Complete Atlantis with all modes enabled.
Terminate the leader of the 2nd ranged division in any urgency mission.
Repel the leader of the 2nd boss division in any urgency mission.
Repel Rak'Thul, the Demolitionist in any urgency mission.
Terminate the leader of the 3rd ranged division in any urgency mission.
Repel the leader of the 3rd boss division in any urgency mission.
Repel Naz'Roth, the Tyrant in any urgency mission.
Unlock weapon augmentations for Plasma Cannon.
Unlock weapon augmentations for Satellite Bomb.
Unlock weapon augmentations for Ion Barrier.
Unlock weapon augmentations for Cyber Burst.
Unlock weapon augmentations for Laser Orb.
Unlock weapon augmentations for Photon Blaster.
Unlock module augmentations for Mending.
Unlock module augmentations for Reload.
Unlock module augmentations for Collector.
Unlock module augmentations for Intelligence.
Unlock module augmentations for Thrust.
Unlock module augmentations for Bounty.
Unlock weapon augmentations for Lightning Gauntlet.
Unlock module augmentations for Accelerator.
Complete Area 51 with all modes enabled.
Unlock module augmentations for Vitality.