Games like Neat Particles
Games like Neat Particles include People Playground, House Flipper, Stardew Valley, Terraria, and 鬼谷八荒 Tale of Immortal. We matched them by the tags players give Neat Particles on Steam (Simulation, Design & Illustration, Sandbox, 2D, and Abstract): closest matches first, and among equally close ones the better-known games.

People Playground
Shared: Sandbox · 2D · Simulation

House Flipper
Shared: Simulation · Design & Illustration · Sandbox

Stardew Valley
Shared: Simulation · Pixel Graphics · Sandbox

Terraria
Shared: Sandbox · 2D · Pixel Graphics

鬼谷八荒 Tale of Immortal
Shared: Simulation · Sandbox · Singleplayer

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Colorful

Graveyard Keeper
Shared: Simulation · Pixel Graphics · Sandbox

The Sims™ 4
Shared: Simulation · Sandbox · Free to Play

Papers, Please
Shared: Simulation · Pixel Graphics · Singleplayer

Horsey Game
Shared: Simulation · Sandbox · 2D

Planet Coaster
Shared: Simulation · Sandbox · Singleplayer

Trove
Shared: Sandbox · Free to Play · Pixel Graphics

WorldBox - God Simulator
Shared: Simulation · Sandbox · Pixel Graphics

SUMMERHOUSE
Shared: Sandbox · Simulation · Pixel Graphics

Spaceflight Simulator
Shared: Sandbox · Simulation · 2D

Prison Architect
Shared: Simulation · Sandbox · 2D

Sand:box
Shared: Simulation · Sandbox · 2D

My Dream Setup
Shared: Design & Illustration · Simulation · Sandbox

The Escapists
Shared: Simulation · Pixel Graphics · 2D

RimWorld
Shared: Sandbox · Simulation · Singleplayer

Gourdlets
Shared: Sandbox · Simulation · Colorful

The Escapists 2
Shared: 2D · Pixel Graphics · Simulation

Growtopia
Shared: Simulation · Sandbox · 2D

Planet Coaster 2
Shared: Simulation · Sandbox · Singleplayer