Games like Agence
Games like Agence include Librarian: Tidy Up the Arcane Library!, Papers, Please, Mountain, Cooking Simulator VR, and Mirror 2: Project X. We matched them by the tags players give Agence on Steam (Artificial Intelligence, Simulation, Multiple Endings, Experimental, and Interactive Fiction): closest matches first, and among equally close ones the better-known games.

Librarian: Tidy Up the Arcane Library!
Shared: Artificial Intelligence · Simulation · Singleplayer

Papers, Please
Shared: Simulation · Multiple Endings · Singleplayer

Mountain
Shared: Simulation · Experimental · Singleplayer

Cooking Simulator VR
Shared: VR · Simulation · 3D

Mirror 2: Project X
Shared: 3D · Interactive Fiction · Multiple Endings

Townscaper
Shared: Experimental · Simulation · Singleplayer

PC Building Simulator
Shared: Simulation · Immersive Sim · 3D

Assetto Corsa
Shared: Simulation · VR · Singleplayer

House Flipper
Shared: Simulation · Singleplayer · Immersive Sim

Detroit: Become Human
Shared: Multiple Endings · Cinematic · Singleplayer

KinitoPET
Shared: Multiple Endings · Artificial Intelligence · Immersive Sim

X-Plane 12
Shared: Simulation · VR · Immersive Sim

Road to Empress Ⅱ
Shared: Interactive Fiction · Artificial Intelligence · Simulation

Kerbal Space Program
Shared: Simulation · Space · Singleplayer

Electrician Simulator
Shared: Simulation · Immersive Sim · Singleplayer

Derail Valley
Shared: Simulation · VR · Immersive Sim

Love is All Around 2
Shared: Interactive Fiction · Cinematic · Simulation

VTOL VR
Shared: VR · Simulation · Artificial Intelligence

Supermarket Simulator
Shared: Simulation · Singleplayer · Immersive Sim

Mini Motorways
Shared: Simulation · Casual · Singleplayer

Microsoft Flight Simulator (2020) 40th Anniversary Edition
Shared: Simulation · VR · Singleplayer

Fast Food Simulator
Shared: Simulation · Artificial Intelligence · 3D

STAR WARS™: Squadrons
Shared: VR · Simulation · Space

Uncrashed : FPV Drone Simulator
Shared: Simulation · Immersive Sim · Singleplayer