Games like The Sunny Life
Games like The Sunny Life include My Time at Portia, Stardew Valley, Starsand Island, Paralives, and Mon Bazou. We matched them by the tags players give The Sunny Life on Steam (Casual, Indie, Life Sim, RPG, and Open World): closest matches first, and among equally close ones the better-known games.

My Time at Portia
Shared: Life Sim · RPG · Open World

Stardew Valley
Shared: Life Sim · RPG · Indie

Starsand Island
Shared: Life Sim · Casual · RPG

Paralives
Shared: Life Sim · Indie · Open World

Mon Bazou
Shared: Life Sim · Sandbox · Exploration

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

My Time at Sandrock
Shared: Life Sim · Building · RPG

I Am Future: Cozy Apocalypse Survival
Shared: Casual · RPG · Indie

Terraria
Shared: Sandbox · Building · Indie

The Sims™ 3
Shared: Life Sim · Casual · Sandbox

The Sims™ 4
Shared: Life Sim · Building · Casual

Enshrouded
Shared: Open World · RPG · Exploration

Rust
Shared: Open World · Building · Sandbox

Kenshi
Shared: Open World · RPG · Sandbox

Keplerth
Shared: Sandbox · Casual · Open World

Project Zomboid
Shared: Open World · Sandbox · Indie

Disney Dreamlight Valley
Shared: Life Sim · Casual · Exploration

Littlewood
Shared: Life Sim · RPG · Casual

Coral Island
Shared: Life Sim · RPG · Open World

Palia
Shared: Life Sim · Casual · Building

Two Point Museum
Shared: Casual · Life Sim · Building

The Matchless Kungfu
Shared: Open World · RPG · Sandbox

Slime Rancher
Shared: Open World · Exploration · Casual

Valheim
Shared: Open World · Building · Exploration