Here is the full list of all 31 GOAT OF DUTY achievements.
Win 50 Gun matches.
Win 340 matches in any mode.
Kill 500 opponents with Headshots.
Win 50 Free For All matches.
Win 50 FusRoArena matches.
Win 100 Team Deathmatches.
Kill 250 opponents with Explosions.
Send flying 50 opponents with the FusRoBeh.
Kill 25 opponents with the Zero-G Saws. (Alternative fire)
Cook 50 opponents with the Roaster.
Detonate 50 opponents with the Grenade Launcher.
Nail 50 opponents with the Piercer.
"Don't move! He can't see us if we don't move."
Impale 50 opponents with the Impaler.
Slice 50 opponents with the Ripper.
Explode 50 opponents with the Missile Launcher.
Actually, your opponents will complete this achievement for you.
Yes, we developers make achievements for you, bug-seeking goats.
Goats bodies are not made for flight. But they dont' know that, so they try it anyway.
Don't expect they will explode for real.
Hit an opponent 5 times with Ram or FusRoBeh without making it touch the ground.
Push 50 opponents off a ledge.
Bleat 100 times. (In this game)
Ram an opponent and kill him midair.
Ram 25 opponents to death.
Kill 50 opponents with Headshots.
Kill 101 opponents.
Kill 25 opponents in a row without dying.
Snipe 50 opponents with the LightGun.
Also goats have their special place.
Kill 10 opponents in a row without dying.