The Old Man Add-on for Arma 3 has 5 achievements.
Destroyed CSAT's biogenetic weapons laboratory in the Old Man scenario.
Completed the Old Man scenario, giving the counteragent to the insurgents.
Completed the Old Man scenario, giving the counteragent to Keystone.
Completed the Old Man scenario, giving the counteragent to Dr. Drábek.
Killed Keystone in the Old Man scenario.