Here is the full list of all 29 Friends vs Friends achievements.
Reach level 5
Burn yourself alive with your own Karrotov
Play your first quick play game
Win 10 quick play games
Win 100 quick play games
Win 1000 quick play games
Reach level 10
Reach level 20
Reach level 30
Reach level 40
Get a win streak of 5 matches
Get a win streak of 25 matches
Open 25 booster packs
Open 250 booster packs
Unlock all the base cards
Max out all the base cards
Shoot a rival's grenade before it touches the ground
Ignore gun safety rules in the shooting range
Fall to your death
Fall to your death again
Destroy 25 hearts
Transform yourself into an Ice Giant
Survive a sniper headshot thanks to your helmet
Use Swap Weapons after a rival used Swap Weapons on you
Kill someone with a sticky bomb attached to your body
End a match with a tie
Reach super speed
Get a win streak of 15 matches
Get a duty-free ice cream