Here is the full list of all 54 Ashes of the Singularity: Escalation achievements.
Reached Legendary status in multiplayer. #respect
Reached rank 5 in ranked multiplayer
Defeated an unfair-teams skirmish against Insane AIs with a fellow human fighting at your side
Won a skirmish with a handicap
Watch a game as an Observer
Won a game after your Nexus was dealt critical damage
Stomped the comp with human teammates
Stuck around to the bitter end in a multiplayer loss
Joined a ranked match
Win a match after a teammate has lost. Thanks a bunch, pal.
Won a skirmish against unfair teams
Won a 3+ player free-for-all game as Substrate
Defeated an unfair-teams skirmish against Insane AIs with no human help
Completed the ninth Escalation mission
Completed the eigth Escalation mission
Completed the seventh Escalation mission
Reached level 5 with a Dreadnought
Completed the sixth Escalation mission
Completed the fifth Escalation mission
Completed the fourth Escalation mission
Completed the third Escalation mission
Completed the second Escalation mission
Completed the first Escalation mission
Completed the third Memories mission
Completed the second Memories mission
Completed the first Memories mission
Won the Ascendancy Wars for the Post-Humans
Completed the eighth Ascendency mission
Won a six-player match in the Ascendancy Wars
Conquered Silgul
Conquered Artorius
Conquered Falness
Own 10,000 metal
Own 10,000 radioactives
Fielded 30 units of bombers at once
Won a skirmish game as the Substrate
Won a match without wasting a single resource
Completed the sixth Ascendency mission
Won a skirmish game as the Post-Humans
Lost a skirmish game
Didn't even sweat wasting 3,000 metal in a single match
Won a match by destroying all opposition
Completed the fifth Ascendency mission
Conquered Roceda
Completed the Tutorial
Fielded 1,000 Logistics worth of units
Reached level 10 in any global upgrade
Upgrade a building
Completed the fourth Ascendency mission
Won a match on victory points
Called in orbital support
Completed the third Ascendency mission
Complete the second Ascendency mission
Completed the first Ascendency mission