Games like Duck Life 4
Games like Duck Life 4 include Trine 2: Complete Story, Stardew Valley, SpeedRunners, Sonic Superstars, and Trine Enchanted Edition. We matched them by the tags players give Duck Life 4 on Steam (Casual, Racing, RPG, Sports, and Action-Adventure): closest matches first, and among equally close ones the better-known games.

Trine 2: Complete Story
Shared: Action-Adventure · Platformer · 2D Platformer

Stardew Valley
Shared: RPG · Life Sim · Casual

SpeedRunners
Shared: Racing · Platformer · Casual

Sonic Superstars
Shared: Casual · Platformer · Action-Adventure

Trine Enchanted Edition
Shared: Action-Adventure · 2D Platformer · Casual

Touhou Mystia's Izakaya
Shared: Casual · RPG · Time Management

Tribal Hunter
Shared: Casual · Action-Adventure · 2D Platformer

Duck Life: Retro Pack
Shared: Casual · Racing · Sports

Retirement Simulator
Shared: RPG · Casual · Life Sim

Garfield Kart
Shared: Racing · Sports · Casual

Trine 5: A Clockwork Conspiracy
Shared: RPG · Action-Adventure · Platformer

Melvor Idle
Shared: Casual · RPG · Indie

FANTASY LIFE i: The Girl Who Steals Time
Shared: Casual · RPG · Action-Adventure

Kabuto Park
Shared: Casual · Creature Collector · RPG

WEBFISHING
Shared: Casual · Creature Collector · Indie

Chinese Parents
Shared: Casual · RPG · Life Sim

My Time at Portia
Shared: RPG · Casual · Life Sim

Paddle Paddle Paddle
Shared: Casual · Racing · Sports

Duck Life 4 Classic
Shared: Casual · Racing · Sports

The Darkest Tales — Into the Nightmare
Shared: Action-Adventure · Platformer · 2D Platformer

Garfield Kart - Furious Racing
Shared: Racing · Sports · Casual

Slime Rancher 2
Shared: Casual · Creature Collector · Cute

Nexomon: Extinction
Shared: Casual · RPG · Creature Collector

Castlevania: Belmont's Curse
Shared: RPG · Platformer · Action-Adventure