Here is the full list of all 179 DESYNC achievements.
Complete User Integration
Petrified 50 Enemies
Discovered all Offence Styles
Discovered all Priority Styles
Maximised Firerate Increase
Progressed Firerate Shard Tier
Cleared a level with S+
Desynced every enemy in a level
Maximised Retention Increase
Maximised Speed Increase
Progressed Stability Imbue Insertion
Progressed Dull Imbue Insertion
Used the Aegis and Parried Xeoron
Used the Pulsar to Desync Ypsiliform
Defeated Ypsiliform without taking damage
Defeated Zentore without taking damage
Defeated Ypsiliform swiftly
Melted 50 Shards
Generated 50 Shards
Cleared Stridulitron Aberration
Discovered all Manoeuvre Styles
Defeated Zentore Swiftly
Deny Zentore from healing over 33% of it's health
Progressed Velocity Imbue Insertion
Progressed Strength Imbue Insertion
Progressed Coldcross Sidearm Level
Initialize all Polyhedrom Shard Slots
Progressed Toxburst Sidearm Level
Initialize all Diameteor Shard Slots
Initialize all Osmoflux Shard Slots
Defeated Xeoron without taking damage
Executed the Joust Attack Sequence
Executed the Dismayer Attack Sequence
Executed the Aperture Attack Sequence
Progressed Pulsar Sidearm Level
Executed the Pull Apart Attack Sequence
Executed the Antisocial Attack Sequence
Executed the Bounced Attack Sequence
Overkilled 500 Enemies
Executed the Cooldown Attack Sequence
Executed the Basher Attack Sequence
Progressed Aegis Sidearm Level
Executed the Refusal Attack Sequence
Executed the Staked Attack Sequence
Executed the Osmosis Attack Sequence
Executed the Slingshot Attack Sequence
Executed the Processor Attack Sequence
Progressed Speed Shard Tier
Executed the Decimator Attack Sequence
Executed the Sculptor Attack Sequence
Executed the Fragment Attack Sequence
Executed the Chemist Attack Sequence
Executed the Amplitude Attack Sequence
Maximised Damage Increase
Initialize all Wavescythe Shard Slots
Progressed Retention Shard Tier
Executed the Riposte Attack Sequence
Cleared Troglobionic Aberration
Toxified 50 Enemies
Gained a total score of 10,101,101
Combined all Zone Structs
Defeated Ypsiliform the Defenders
Cleared Zenith Aberration
Initialize all Diffuserrail Shard Slots
Cleared Zenith
Discovered the Virus Core
Executed the Aerial Attack Sequence
Executed the Plague Attack Sequence
Executed the Extent Attack Sequence
Cleared Meridian Aberration
Executed the Penetrator Attack Sequence
Desynced 100 Enemies
Froze 50 Enemies
Executed the Fusillade Attack Sequence
Cleared Necropolis Aberration
Defeated Xeoron Swiftly
Cleared Helix Aberration
Executed 1000 Attack Sequences
Killed 1000 Enemies
Executed the Coolant Attack Sequence
Cleared Biomineral Aberration
Cleared Troglobionic
Discovered the Osmoflux Weapon
Discovered the Pulsar Sidearm
Executed the Consumed Attack Sequence
Discovered the Reform Core
Progressed Damage Shard Tier
Cleared Approach Aberration
Maintained Desync Time for over 15 seconds
Maxed out the Desync Stream
Maxed out every Stream at once
Maxed out the Attack Sequence Stream
Cleared Colossal Aberration
Cleared a level with perfect accuracy
Launched 100 Enemies
Executed the Unseen Attack Sequence
Executed the Dismantler Attack Sequence
Executed the Ambidextrous Attack Sequence
Cleared Stridulitron
Executed the Acidic Attack Sequence
Discovered the Freeze Core
Discovered the Stability Imbue
Discovered the Diffuserrail Weapon
Defeated Zentore the Defender
Cleared Meridian
Discovered the Fracture Core
Executed the Entrapment Attack Sequence
Executed the Divider Attack Sequence
Executed the Deliverance Attack Sequence
Executed the Stimulator Attack Sequence
The true DESYNC starts here
Discovered the Wavescythe Weapon
Cleared Helix
Discovered the Dull Imbue
Executed the Drilled Attack Sequence
Executed the Lanced Attack Sequence
Executed the Shocker Attack Sequence
Discovered the Toxburst Sidearm
Discovered the Corruptor Core
Maxed out the Overkill Stream
Cleared Biomineral
Maxed out the Kill Stream
Executed the Deliquesce Attack Sequence
Discovered the Nutation Core
Executed the Nether Attack Sequence
Executed the Overcharged Attack Sequence
Discovered the Polyhedrom Weapon
Executed the Delayer Attack Sequence
Executed the Candescence Attack Sequence
Defeated Xeoron the Defender
Cleared Colossal
Executed the Singleton Attack Sequence
Executed the Abyssal Attack Sequence
Executed the Axed Attack Sequence
Executed the Cored Attack Sequence
Discovered the Velocity Imbue
Discovered the Distortion Core
Discovered the Coldcross Sidearm
Executed the Alternator Attack Sequence
Discovered the Diameteor Weapon
Initialize all TerraBlaster Shard Slots
Initialize all Tristol Shard Slots
Cleared Approach
Discovered the Strength Imbue
Discovered the Additive Core
Blasted 100 Enemies
Executed the Justicar Attack Sequence
Executed the Flicker Attack Sequence
Cleared Necropolis
Discovered the Aegis Sidearm
Executed the Entripment Attack Sequence
Discovered the Restore Core
Executed the Oblitherator Attack Sequence
Executed the Aggressor Attack Sequence
Executed the Switcher Attack Sequence
Executed the Xaero Attack Sequence
Executed the Multiplex Attack Sequence
Executed the Pierced Attack Sequence
Discovered the Terrablaster Weapon
Executed the Evader Attack Sequence
Executed the Energizer Attack Sequence
Executed the Mercy Attack Sequence
Executed the Augur Attack Sequence