Games like Party Harvest
Games like Party Harvest include Stardew Valley, Farming Simulator 19, Farm Together, Sun Haven, and Fields of Mistria. We matched them by the tags players give Party Harvest on Steam (RPG, Farming Sim, Agriculture, Multiplayer, and Party-Based RPG): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Farming Sim · RPG · Multiplayer

Farming Simulator 19
Shared: Farming Sim · Agriculture · Multiplayer

Farm Together
Shared: Agriculture · Multiplayer · Farming Sim

Sun Haven
Shared: Farming Sim · Multiplayer · RPG

Fields of Mistria
Shared: Farming Sim · RPG · Agriculture

My Time at Portia
Shared: RPG · Farming Sim · Singleplayer

Coral Island
Shared: Farming Sim · RPG · Agriculture

Palia
Shared: Multiplayer · Farming Sim · Exploration

The Elder Scrolls Online - Standard Edition
Shared: RPG · Multiplayer · Exploration

鬼谷八荒 Tale of Immortal
Shared: RPG · Singleplayer · Choose Your Own Adventure

DAVE THE DIVER
Shared: RPG · Singleplayer · Exploration

Infinity Nikki
Shared: RPG · Multiplayer · Cute

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

Dinkum
Shared: Agriculture · Farming Sim · RPG

Farming Simulator 15
Shared: Farming Sim · Multiplayer · Agriculture

Farming Simulator 17
Shared: Farming Sim · Multiplayer · Agriculture

STORY OF SEASONS: Friends of Mineral Town
Shared: Farming Sim · RPG · Singleplayer

Farming Simulator 22
Shared: Farming Sim · Multiplayer · Agriculture

Potion Craft: Alchemist Simulator
Shared: Singleplayer · RPG · Relaxing

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

Terraria
Shared: Multiplayer · 2D · Exploration

Clanfolk
Shared: Farming Sim · RPG · Agriculture

Farlands
Shared: Farming Sim · Agriculture · Exploration

Paleo Pines
Shared: Farming Sim · Exploration · Singleplayer