Marvel's Midnight Suns

For this achievement, you need to use cards that say Knockback or Forceful Knockback to kill at least two enemies in a single card play. Minions (enemies without health bars that die to any damage) are the easiest to do this on, but with strong enough cards and enemies that have already taken damage this can be done on anyone. Just ensure that both enemies have a skull icon over their heads before committing to the play - this indicates they will die from the attack.

Most Knockback cards have a very small cone they will move an enemy, but some cards can Knockback in any direction making KOs easier.

I think this achievement or the tracker may be bugged. I’ve been sitting at 96% for ages now and despite KOing two enemies with a single Knockback ability several times the achievement hasn’t unlocked yet. Even abilities like Bladestorm that knockback multiple enemies into even more enemies doesn’t increase the tracker.

After the 1.05 patch hit Xbox, I still was not getting this achievement through normal means. Someone on Reddit with the same problem on PlayStation said they were able to unlock it after starting New Game+. However, I manage to unlock it finally using Captain America in the T.H.R.E.A.T. Room. Not sure what may have been different about that encounter, but if you run into trouble like me it's worth a shot.

You can use the cards that have a knockback ability and the move option which allows you to knock back