Games like Little Harvest
Games like Little Harvest include Stardew Valley, Rusty's Retirement, Plantera, Factorio, and Tiny Pasture. We matched them by the tags players give Little Harvest on Steam (Idler, Casual, Farming Sim, Building, and Automation): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Farming Sim · Agriculture · Building

Rusty's Retirement
Shared: Idler · Farming Sim · Automation

Plantera
Shared: Idler · Automation · Building

Factorio
Shared: Automation · Strategy · Crafting

Tiny Pasture
Shared: Idler · Farming Sim · Casual

My Time at Portia
Shared: Farming Sim · Casual · Crafting

Melvor Idle
Shared: Idler · Casual · Automation

Farm Together
Shared: Casual · Agriculture · Farming Sim

I Am Future: Cozy Apocalypse Survival
Shared: Casual · Farming Sim · Agriculture

Autonauts
Shared: Automation · Casual · Indie

Coral Island
Shared: Farming Sim · Agriculture · Building

(the) Gnorp Apologue
Shared: Idler · Building · Strategy

shapez 2 - Factory
Shared: Automation · Building · Strategy

Farm Manager 2018
Shared: Farming Sim · Casual · Building

Your Big, Cute Monster Farm
Shared: Casual · Idler · Farming Sim

Cookie Clicker
Shared: Idler · Casual · Indie

Farlands
Shared: Farming Sim · Building · Agriculture

Alchemy Factory
Shared: Automation · Building · Casual

shapez
Shared: Automation · Strategy · Building

Havendock
Shared: Strategy · Automation · Building

Palia
Shared: Farming Sim · Building · Casual

Luma Island
Shared: Farming Sim · Casual · Building

Incredicer
Shared: Idler · Casual · Strategy

Autonauts vs Piratebots
Shared: Casual · Automation · Strategy