Games like Oasis
Games like Oasis include Stardew Valley, DAVE THE DIVER, Banana, Tiny Pasture, and Wingspan. We matched them by the tags players give Oasis on Steam (Casual, Singleplayer, 2D, Nature, and Pixel Graphics): closest matches first, and among equally close ones the better-known games.

Stardew Valley
Shared: Pixel Graphics · Farming Sim · Simulation

DAVE THE DIVER
Shared: Casual · Pixel Graphics · Singleplayer

Banana
Shared: Singleplayer · Casual · 2D

Tiny Pasture
Shared: Casual · Farming Sim · Pixel Graphics

Wingspan
Shared: Casual · Nature · Board Game

Balatro
Shared: Singleplayer · Pixel Graphics · Casual

Game Dev Tycoon
Shared: Casual · Singleplayer · Simulation

Unpacking
Shared: Casual · Pixel Graphics · Singleplayer

People Playground
Shared: 2D · Singleplayer · Simulation

Papers, Please
Shared: Singleplayer · Pixel Graphics · Simulation

Rusty's Retirement
Shared: Farming Sim · Simulation · Nature

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

Project Highrise
Shared: Singleplayer · 2D · Simulation

Slime Rancher 2
Shared: Singleplayer · Casual · Creature Collector

House Flipper
Shared: Singleplayer · Simulation · Casual

Plants vs. Zombies GOTY Edition
Shared: Singleplayer · Casual · 2D

Oxygen Not Included
Shared: Singleplayer · 2D · Base Building

Potion Craft: Alchemist Simulator
Shared: Singleplayer · Simulation · 2D

Plague Inc: Evolved
Shared: Singleplayer · Simulation · Casual

Vampire Survivors
Shared: Pixel Graphics · 2D · Singleplayer

Forager
Shared: Pixel Graphics · 2D · Farming Sim

The Escapists
Shared: Singleplayer · Pixel Graphics · 2D

Ballionaire
Shared: Singleplayer · Casual · 2D

Moonstone Island
Shared: 2D · Pixel Graphics · Creature Collector