Here is the full list of all 32 Robot Fighting achievements.
Get annihilated by the Judge
Win 10 times with Driller of drill-equipped Minibot
Trade some gold for silver
Defeat Venom, the 2nd boss
Defeat Megalomaniac, the 1st boss
Visit the group of the game in social networks
Crush 50 enemies with the same robot type as yours
Crush 50 bots from the boxes with a saw
Use all kinds of emoji in the same fight
Destroy 100 boxes with an axe
Crush 10 enemies by exploding the gas cylinders
Win the arena fight without dealing any damage to anybody
Win the fight without getting any damage
Crush 3 opponents in less than a minute
Push your opponent into a fire trap
Break 10 boxes
Set free 7 bots from the boxes in the same fight
Win your first battle
Let the bots from boxes crush an enemy
Own 6 armor types
Own 12 weapon types
Play 7 days in a row
Play as Clown and crush the Respirator
With Boxer, win over all types of robots in the same league
Play as Pterodactyl and crush Alien, or vice versa
Collect all types of weapons and armor
Play as Capitan and crush Jaws and Piranha
Defeat Anansi, the 3rd boss
Defeat 99 Spikes, the 4th boss
Defeat Inquisitor, the 5th boss
Complete the Challenge Mode
Own 19 minibots