Here is the full list of all 20 Rogue Company achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Win 100 matches
Play 25 hours in a party
Revive a total of 100 players
Down 4 enemies in one round
Win 8 matches with 8 different Rogues
Fully upgrade a primary weapon
Accrue a total of $70,000 in a single match
Down an enemy with a gadget while looking away from them
Down an enemy while you have less than 10% health
Purchase 3 perks in a single match
Win a match without purchasing a primary weapon
Complete the tutorial
Down an enemy with a melee weapon
Down an enemy while riding a zipline
Pick up another player's weapon and down an enemy with it
Down an enemy without taking return damage
Down 10 enemies
Deal 1,000 damage with gadgets
Down 20 enemies in a single match
Deal a total of 10,000 damage to players via headshots