Here is the full list of all 19 Aftercharge achievements.
Take down 50 workonics
Reach level 30
Win 50 games
Take down a workonic stuck in your trap
Break 20 extractors
Take down a workonic while airborne
Win a round as workonics while your team is affected by Orbital Strikes
Deliver the last hit on the last extractor while being the last remaining workonic
Use your Invincibility to save an ally from being shot down
Shoot a tracked disabled workonic and reveal his two allies
Take down a stealth workonic with your weapon
Imprison two disabled workonics with three walls
Take down a workonic tracked by an ally who's out of energy
Hit three workonics with the same Air Strike
Revive two allies while your Speed Boost is active
Destroy 8 devices with a single Pulse Barrage
Blind two enforcers simultaneously
Imprison two enforcers in your Protective Shield
Complete both tutorials