City of Villains - Gladiator badges

Arachnobot: Awarded with the Agent of Discord badge.
Button Man Gunner: Reach level 20.
Cobra: Collect the Snake Charmer badge in Mercy Island.
Fire Thorn Caster: Reach level 30.
Juicer Sniper: Collect the Watcher On The Knoll badge in Nerva Archepelago.
Longbow Nullifier: Win one match in the Arena.
Longbow Rifleman: Collect the Locked And Loaded badge in Nerva Archepelago.
Longbow Warden 2: Complete a player vs. player mission helping your side, and another hindering your enemies.
Mook: Collect the Washed Up exploration badge in Port Oakes.
Mook Capo: Awarded with the Stone Cold badge.
Nebula Elite Buckshot: Reach level 10.
Night Haunt: Trap 50 ghosts in Fort Cerberus.
Red Hand: Trap 100 ghosts in Fort Cerberus
Wailer: Collect the Stone Keeper badge in St. Martial.

Supergroup badges
Complete the indicated task in Supergroup mode to unlock the corresponding badge. The requirements are collective and are the sum of all the efforts of members of your Supergroup:

Analyzer Base Defense: Get damaged by 20,000,000 points.
Cap Au Diable Beacon: Collect the five exploration badges in Cap Au Diable.
Improved Igniter: Collect 100,000,000 influence outside of trading.
Mega Moniter Plans: Collect five Supergroup badges.
Mercy Island Beacon: Collect the six exploration badges in Mercy Island.
Nerva Beacon: Collect the five exploration badges in Nerva Archepelago.
Port Oakes Beacon: Collect the four exploration badges in Port Oakes.
Repulsor Base Defense: Pay off 1,000,000 in debt.
SG Mission Computer: Sidekick or lackey for at least ten hours.
Sharkhead Beacon: Collect the four exploration badges in Sharkhead Isle.
St. Martial Beacon: Collect the four exploration badges in St. Martial.