Games like Nihilist Simulator
Games like Nihilist Simulator include Wobbly Life, Chained Together, 寄甡 Symbiotic Love, Home Behind, and That's not my Neighbor. We matched them by the tags players give Nihilist Simulator on Steam (Simulation, Adventure, Indie, Casual, and Violent): closest matches first, and among equally close ones the better-known games.

Wobbly Life
Shared: Adventure · Simulation · Casual

Chained Together
Shared: Adventure · Casual · Simulation

寄甡 Symbiotic Love
Shared: Indie · Simulation · Casual

Home Behind
Shared: Adventure · Indie · Simulation

That's not my Neighbor
Shared: Adventure · Casual · Simulation

Game Dev Tycoon
Shared: Simulation · Indie · Casual

Hiveswap Friendsim
Shared: Simulation · Indie · Adventure

Streamer Life Simulator
Shared: Simulation · Casual · Indie

How to Make an Atomic Bomb in Your Garden
Shared: Simulation · Indie · Adventure

DOKA 2 KISHKI EDITION
Shared: Violent · Simulation · Indie

Achievement Clicker
Shared: Simulation · Casual · Indie

人间 The Lost We Lost
Shared: Simulation · Indie · Adventure

There Is No Game: Wrong Dimension
Shared: Indie · Adventure · Casual

House Flipper
Shared: Simulation · Casual · Adventure

DAVE THE DIVER
Shared: Adventure · Casual · Simulation

Emily is Away Too
Shared: Simulation · Indie · Casual

Plague Inc: Evolved
Shared: Simulation · Indie · Casual

[Chillas Art] The Convenience Store
Shared: Indie · Adventure · Simulation

Slime Rancher
Shared: Adventure · Simulation · Casual

Mountain
Shared: Simulation · Indie · Casual

Plebby Quest: The Crusades
Shared: Indie · Casual · Simulation

Florence
Shared: Indie · Adventure · Casual

Death Coming/死神来了
Shared: Casual · Adventure · Violent

Granny Simulator
Shared: Simulation · Indie · Violent