Only Fox and Sir Oofie come unlocked. The rest: meet the requirement and buy them with silver in the Unlocks tab.
In rough unlock order. The passive is what makes each one special; the rest (health, damage, starting weapon) changes with patches.
Luck Blessing: more luck with every level (better items and better odds on anything chance-based).
Unlocked from the start.
Fortified: gains armour with every level. The easiest one to survive with.
Unlocked from the start.
Speed Demon: more damage with every level and more damage the faster you move.
Kill 1,000 skeletons (they never stop coming in the Forest).
Flex: flexing blocks damage, stuns nearby enemies and adds permanent damage.
Get the Damage tome to level 7 and buy the Aura weapon.
Warrior: more damage with every level.
Kill 15,000 goblins and buy the Axe weapon.
Crit Happens: more critical chance with every level.
Complete the Forest on Tier 1 and buy the Revolver.
Lockdown: reflects damage (thorns) and hits harder at low health.
Get the Aegis, unlock the Thorns tome with it (250 blocks), level it to 9 and buy her.
Stonks: more gold with every level and more damage the more gold you carry.
Complete the Forest on Tier 2.
Monke Grip: climbs walls and jumps very high.
Find and free Monke in the Forest (the hidden banana) and buy the Bananarang.
More pickup range with every level; the fastest character.
Complete 2 challenges and buy the Wireless Dagger.
Marks random enemies: marked enemies take much more damage.
Defeat Bush in the Forest (a bush that is not a bush) and buy the Sniper Rifle.
Flow State: more attack speed with every level.
Defeat Bandit in the Desert (he comes out of the Bandit Statue).
Float: deals more damage while airborne.
Kill 100 enemies with the Tornado while airborne, in the Desert.
Frost Aura: slows every enemy around her.
Duplicate the Ice Crystal three times in a row in a Microwave and buy the Frostwalker.
Plague: poisoned enemies explode.
Poison 50,000 enemies with the Moldy Cheese and buy the Poison Flask.
Shadow Step: more evasion with every level and executes enemies when you dodge.
Get the Katana (a 5% drop from Desert Tumbleweeds) and buy it.
Vampirism: lifesteal on hit and more damage at low health.
Complete the Desert on Tier 2 and get Blood Magic.
Quantum XP: more experience with every level.
Complete 6 challenges and buy the Black Hole.
Every level raises difficulty by 1%: more danger, more loot.
Complete the Forest on Tier 3 and get the Corrupted Sword.
Gamba: rolls the dice on every level up, with random rewards or penalties.
Complete 100 quests, get the Luck tome to level 12 and buy the Dice.
Hoarder: a free chest appears every so often, and the interval grows.
Came with the Spooky Update (December 2025). In the Graveyard: defeat Big Bob and buy the Scythe, defeat Spooky Steve and buy him.
21 as of 1 November 2026 (20 at launch plus Roberto). Two come unlocked; the rest are bought with silver after meeting their requirement.
It depends on the patch, but public tier lists usually put Megachad (blocks damage and gains permanent damage), Ninja (dodges and executes) and Vlad (lifesteal) at the top. To start, Sir Oofie.
Silver, from about 8 to about 32 coins depending on the character; guides disagree on the figures and they change with patches. The exact price is in the Unlocks tab.
Sources: the Megabonk community wiki (megabonk.wiki) and public guides (Dexerto, TheGamer, Destructoid, Sportskeeda, games.gg, megabonk.org), as of 1 November 2026. Megabonk changes with every patch: numbers and requirements may vary; when in doubt, the game's Unlocks tab is right. Megabonk is by vedinad; this is fan content.