Games like Birthdays the Beginning
Games like Birthdays the Beginning include Slime Rancher, SPORE™, Slime Rancher 2, Wobbledogs, and Planet Coaster. We matched them by the tags players give Birthdays the Beginning on Steam (Simulation, God Game, Sandbox, Dinosaurs, and Singleplayer): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Cute · Singleplayer · Simulation

SPORE™
Shared: God Game · Sandbox · Simulation

Slime Rancher 2
Shared: Cute · Singleplayer · Simulation

Wobbledogs
Shared: Simulation · Sandbox · Cute

Planet Coaster
Shared: Simulation · Sandbox · Family Friendly

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Singleplayer

The Sims™ 4
Shared: Simulation · Sandbox · Singleplayer

Equilinox
Shared: Simulation · Sandbox · God Game

Planet Coaster 2
Shared: Simulation · Sandbox · God Game

Jurassic World Evolution
Shared: Simulation · Dinosaurs · Sandbox

Jurassic World Evolution 2
Shared: Simulation · Dinosaurs · Sandbox

Garry's Mod
Shared: Sandbox · Simulation · Singleplayer

Universe Sandbox
Shared: Simulation · Sandbox · God Game

Reus
Shared: God Game · Simulation · Sandbox

Planet Zoo
Shared: Simulation · Sandbox · Singleplayer

Cities: Skylines
Shared: Simulation · Sandbox · Singleplayer

The Sims™ 3
Shared: Simulation · Sandbox · Singleplayer

Townscaper
Shared: Sandbox · Simulation · Singleplayer

House Flipper
Shared: Simulation · Singleplayer · Sandbox

Cooking Simulator
Shared: Simulation · Sandbox · Singleplayer

Megaquarium
Shared: Simulation · Sandbox · Casual

MyVoiceZoo
Shared: Simulation · Sandbox · Cute

WorldBox - God Simulator
Shared: God Game · Simulation · Sandbox

PowerWash Simulator
Shared: Simulation · Sandbox · Casual