Here is the full list of all 49 Radio Commander achievements.
Campaign mission 3 completed
Ordered a friendly-fire airstrike
Hit both a friendly and enemy unit with a single air strike
Flanked at least 3 enemy units during a single mission
Issued orders to at least 3 units within 1 minute
Campaign mission 2 completed
Campaign mission 1 completed
Campaign mission 4 completed
Campaign mission 5 completed
Campaign mission 6 completed
Campaign mission 7 completed
Campaign mission 8 completed
Campaign mission 9 completed
Finished the Campaign
Campaign mission 1 completed on Veteran Mode
Campaign mission 2 completed on Veteran Mode
Campaign mission 3 completed on Veteran Mode
Campaign mission 4 completed on Veteran Mode
Campaign mission 5 completed on Veteran Mode
Campaign mission 6 completed on Veteran Mode
Campaign mission 7 completed on Veteran Mode
Campaign mission 8 completed on Veteran Mode
Campaign mission 9 completed on Veteran Mode
Finished the Campaign on Veteran Mode
Finished a mission without using time compression
Mission 1 completed under 3 minutes
Mission 5 completed under 10 in-game hours
Eliminated at least 150 enemies with air support
Called down artillery fire dangerously close to friendly positions
Renamed 50 tokens
Medevaced at least 100 wounded
Eliminated at least 200 enemies with helicopters
Admired the base for 5 minutes total
Allowed a squad to run out of ammo on the battlefield
Didn't communicate anything for 3 in-game hours
Mission 2 completed without having your soldiers wounded or KIA
Failed a mission
Completed mission 3 without using any kind of air support
Asked a unit its position 20 times during a single mission
Killed at least 300 enemy soldiers
Rescued as many POWs as you possibly could in mission 4
Have a squad lose track of their position
Ordered a retreat at elast 3 times in one mission
Finished a mission delivering orders only with your voice
Ordered an air strike on a restricted area
Didn't let the enemy forces face your units with superior numbers in mission 6
Sometimes there's just nothing you can do
Enabled the artillery to reach farther targets
Found Echo before sunrise