Here are all the unlockable characters and the Trophies for Castle Crashers, which is definitely one of the more appealing downloadable titles out there.
| Alien | Complete the "Alien Ship" |
| Barbarian | Complete the "King's Arena" |
| Bear | Complete the game as Skeleton |
| Brute | Complete the game as Icekimo |
| Civilian | Complete the game as Peasant |
| Conehead | Complete the "Volcano Arena" |
| Cult Minion | Complete the "Ice Castle" on Insane Mode |
| Fencer | Complete the game as Industrialist |
| Fire Demon | Complete the game as Orange Knight |
| Forest Knight | Complete the game as Thief |
| Gray Knight | Complete "Barbarian Boss" |
| Iceskimo | Complete the "Icy Arena" |
| Industrialist | Complete the game as Blue Knight |
| Killer Beekeeper | Complete the game as Barbarian |
| King | Complete "Pipistrello's Cave" on Insane Mode |
| Necromancer | Complete the "Industrial Castle" on Insane Mode |
| Ninja | Complete the game as Fire Demon |
| Peasant | Complete the "Peasant Arena" |
| Royal Guard | Complete the game as Green Knight |
| Saracen | Complete the game as Royal Guard |
| Skeleton | Complete the game as Red Knight |
| Stove Face | Complete the game as Gray Knight |
| Thief | Complete the "Thieve's Arena" |
| Unmasked Gray Knight | Complete "Catfish" on Insane Mode |
| Animal Handler (Bronze) | Collect all the animal orbs. |
| Arena Master (Silver) | Win 40 Ranked Arena matches |
| Conscientious Objector (Silver) | Complete the Home Castle through the Barbarian Boss areas without attacking any foes. |
| Deer Trainer (Bronze) | Navigate the Abandoned Mill without hitting any obstacles. |
| Kay Eye Ess Ess (Silver) | Collect all 4 Princesses' kisses in a multiplayer game. |
| Maximum Firepower (Bronze) | Using a catapult, fling a knight with maximum power. |
| Medic (Bronze) | In a 4 player game, resuscitate each of your fallen comrades at least once. |
| Melee is Best (Bronze) | Defeat any boss without using magic. |
| Social Networker (Bronze) | Reach 20 hits in a single Volleyball rally. |
| The Traitor (Bronze) | Defeat any boss by playing one of his own minions. |
| Traditional (Bronze) | Complete the game using any character. |
| Treasure Hunter (Bronze) | Find and dig up 10 buried items. |
| You Are Insane (Gold) | Complete Insane mode and become the ultimate Castle Crasher. |