That title sounds like it's straight out of a or an adult-oriented game , likely blending "zero-to-hero" progression with harem and breeding mechanics. The phrasing "Gotta Breed 'Em All" is a clear play on the famous Pokémon catchphrase.
Provide a bit more context and I can help you track down exactly what it is! Harem.King.Peasant.to.Princess.Gotta.Breed.Em.A...
If this is a specific report or story you’ve come across, it usually refers to: That title sounds like it's straight out of