Games like Citadel Siege 2
Games like Citadel Siege 2 include Slime Rancher, Moncage, Streamer Life Simulator, House Flipper, and Slime Rancher 2. We matched them by the tags players give Citadel Siege 2 on Steam (Adventure, Casual, Simulation, Sports, and Abstract): closest matches first, and among equally close ones the better-known games.

Slime Rancher
Shared: Adventure · Simulation · First-Person

Moncage
Shared: Casual · Adventure · Indie

Streamer Life Simulator
Shared: Simulation · Casual · Adventure

House Flipper
Shared: Simulation · Casual · Singleplayer

Slime Rancher 2
Shared: Adventure · Simulation · Casual

DAVE THE DIVER
Shared: Casual · Adventure · Simulation

Thief Simulator
Shared: Simulation · Adventure · First-Person

Golf With Your Friends
Shared: Casual · Sports · Indie

Youtubers Life
Shared: Casual · Adventure · Simulation

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

Love is All Around 2
Shared: Cinematic · FMV · Simulation

Ultimate Fishing® Simulator 2
Shared: Simulation · Sports · Casual

Train Station Renovation
Shared: Casual · Simulation · Indie

美女,请别影响我成仙
Shared: Casual · Simulation · Cinematic

Plane Mechanic Simulator
Shared: Adventure · Simulation · Casual

Fishing Adventure
Shared: Simulation · Sports · Casual

Thief Simulator 2
Shared: Simulation · Adventure · First-Person

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

Home Behind
Shared: Adventure · Casual · Simulation

Passpartout: The Starving Artist
Shared: Casual · Simulation · Indie

Wobbly Life
Shared: Adventure · Simulation · Casual

Road to Empress Ⅱ
Shared: Adventure · Casual · FMV

A Story About My Uncle
Shared: Adventure · First-Person · Indie

SuchArt: Creative Space
Shared: Simulation · Adventure · First-Person