Games like Sage Mountain
Games like Sage Mountain include Stardew Valley, Graveyard Keeper, Fields of Mistria, Touhou Mystia's Izakaya, and 上帝之城 I:监狱帝国 [City of God I - Prison Empire]. We matched them by the tags players give Sage Mountain on Steam (RPG, Indie, Early Access, Simulation, and Agriculture): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: RPG · Pixel Graphics · Simulation

Graveyard Keeper
Shared: RPG · Pixel Graphics · Simulation

Fields of Mistria
Shared: RPG · Pixel Graphics · Simulation

Touhou Mystia's Izakaya
Shared: RPG · Simulation · Pixel Graphics

上帝之城 I:监狱帝国 [City of God I - Prison Empire]
Shared: Indie · RPG · Simulation

Littlewood
Shared: RPG · Pixel Graphics · Simulation

Clanfolk
Shared: RPG · Pixel Graphics · Simulation

Papers, Please
Shared: Indie · Simulation · Pixel Graphics

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Indie · Simulation

OMORI
Shared: Indie · RPG · Pixel Graphics

Path Of Wuxia
Shared: RPG · Indie · Simulation

Sun Haven
Shared: RPG · Pixel Graphics · Simulation

Cyber Manhunt
Shared: RPG · Simulation · Indie

DRAPLINE
Shared: RPG · Simulation · Indie

Retirement Simulator
Shared: RPG · Indie · Simulation

My Time at Portia
Shared: RPG · Simulation · Agriculture

Heartbound
Shared: RPG · Indie · Early Access

Tales of the Black Forest
Shared: RPG · Indie · Pixel Graphics

Farmer's Dynasty - Final Harvest Edition
Shared: RPG · Simulation · Agriculture

Emily is Away Too
Shared: Indie · Simulation · Pixel Graphics

Undertale
Shared: RPG · Pixel Graphics · Indie

The Escapists
Shared: Pixel Graphics · Indie · Simulation

Not Tonight
Shared: RPG · Simulation · Pixel Graphics

SAELIG
Shared: RPG · Simulation · Early Access