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The Monster Breeder

Also known as The Monster Breeder, mb, monster breeder

Turn-based fantasy gladiatorial game with monster breeding. Crossbreed various species to create monster hybrids for gladiatorial combat. Manipulate creatures’ traits with surgery, magic, and alchemy. Manage your enterprise, craft items and upgrade your base. Fight in the arena for gold and glory!

Last update
20 Jun 2026
Players now
4

Latest update

Announcement

Manipulating the appearance of offspring

Hi All, This update adds a new feature to the game. Until now, monsters randomly inherited their external characteristics. From now on, players can influence these inherited traits. You can choose from five optional cat…

1 changeGameplayRead announcement

Update history

Browse past updates and patch notes for this game.

20 updates

Gallery

In-game media

Achievements

Community progression

Top picks from 65 Steam achievements, sorted by player unlock rates.

  • HybridsCrossbreed different species67.1%
  • DeathmatchWin a lethal fight in the arena61.8%
  • TriumphWin a fight in the arena61.6%
  • AlchemistBrew a potion50.3%
  • CaveClear a cave of the creatures46.4%
  • ArmorsmithForge an armor36.0%