Metal Slug Tactics
48 Achievements
1,000
PC
Xbox One
Xbox Series
Optimization
Launch 3 Special Actions in 1 turn with Marco.
10
3.25%
How to unlock the Optimization achievement in Metal Slug Tactics - Definitive Guide
Just a trick. You can use any Marco's Special Action, and cancel it. If you did this 3 times in a turn, then use the skill, it will pop.