Here is the full list of all 29 Convoy achievements.
Win 10 consecutive battles with only the MCV in your convoy
Spend 10000 fuel in total
Steal some vehicles from a TORVAK base
Deliver all ship parts in a single drop
Kill 1000 enemies in total
Defeat Andy
Defeat the boss without doing any side objectives or radio signals
Defeat the boss with only light vehicles
Get shot over a compression coil
Defeat the TORVAK miniboss
Defeat the boss without firing a shot
Defeat the boss without using Laser, Plasma or Railgun weapons
Defeat the boss on medium difficulty
Win a combat without firing a shot
Defeat the boss without using Machine Guns, Cannons or Rocker Launchers
Defeat the boss on hard difficulty
Travel 6000 KM in a single run
Win the jackpot in the Lucky Peacock slotmachines
Defeat the dragon
Fully upgrade 4 units and the MCV in a convoy
Defeat the boss
Have 2000 bolts to spare
Kill 250 enemies in total
Defeat the Privateer miniboss
Kill 35 enemies in a single run
Kill an enemy without taking any damage
Defeat the Raider miniboss
Complete twenty scenarios
Have an enemy unit kill another enemy unit