Successfully complete the indicated task to unlock the corresponding
character:

Alien Hominid: Have the full version of Alien Hominid HD
installed with at least one of its achievement unlocked.
Barbarian: Successfully complete King's Arena offline.
Black Knight: Successfully complete the game with the Grey Knight.
Brute: Successfully complete the game with the Eskimo.
Commoner: Successfully complete the game with the Peasant.
Eskimo: Successfully complete Icy Arena offline.
Fencing Knight: Successfully complete the game with the Industrial
Iron Knight.
Forest Knight: Successfully complete the game with the Thief.
Grey Knight: Defeat the Barbarian Boss.
Industrial Iron Knight: Successfully complete the game with the
Blue Knight.
Killer Beekeeper: Successfully complete the game with the Barbarian.
Ninja: Successfully complete the game with the Red Dragon <#>
Knight (Fire Demon).
Peasant: Successfully complete the game with the Hoodless Peasant.
Periwinkle Knight: Successfully complete the Volcano Arena.
Red Dragon Knight (Fire Demon): Successfully complete the game
with the Orange Knight.
Royal Guard: Successfully complete the game with the Green Knight.
Saracen: Successfully complete the game with the Royal Guard.
Skeleton: Successfully complete the game with the Red Knight.
Thief: Successfully complete Thieves' Arena offline.
White Bear: Successfully complete the game with the Skeleton.