Games Like Backyard Monsters: Base-Building + Monster Collecting + Turn-Based Combat

Backyard Monsters (Kixeye, 2010–2014, Flash/Facebook) blended base-building, monster collection, and async PvP. No perfect clone exists, but these share DNA:

Base-Building + Unit Collection

• Monster Sanctuary (PC/Switch) — Metroidvania + monster tamer, base building, tactical combat.
• Monster Legends (Mobile) — Breed, build habitats, turn-based PvE/PvP. Closest direct descendant.
• Dragon City (Mobile) — Same dev (Socialpoint), dragon-focused, city-building.

Deep Turn-Based Tactics + Collection

• Pokémon Series — Gold standard.
• Temtem / Nexomon / Coromon — Modern Pokémon-likes.
• Digimon World / Cyber Sleuth — Raising + tactics.
• Monster Rancher — Ranch sim + tournament combat.

Base-Building Strategy (No Monsters)

• They Are Billions / Frostpunk / Surviving Mars — Survival city-builders.
• Clash of Clans / Boom Beach — Mobile async PvP base-building.

Hybrid Puzzle/RPG

• Puzzle Quest Series — Match-3 + RPG progression + collection.
• Ironcast — Match-3 + mech combat + roguelite.

For the Backyard Monsters feel: Monster Legends (mobile) or Monster Sanctuary (PC/console).