Games like Ostrich Island
Games like Ostrich Island include Chained Together, Pikuniku, SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated, Kao the Kangaroo: Round 2 (2003 re-release), and Woodle Tree Adventures. We matched them by the tags players give Ostrich Island on Steam (Adventure, Indie, Casual, RPG, and 3D Platformer): closest matches first, and among equally close ones the better-known games.

Chained Together
Shared: Adventure · Casual · Platformer

Pikuniku
Shared: Adventure · Indie · Casual

SpongeBob SquarePants: Battle for Bikini Bottom - Rehydrated
Shared: Adventure · 3D Platformer · Casual

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Casual · 3D Platformer

Woodle Tree Adventures
Shared: Indie · Adventure · Platformer

Wobbly Life
Shared: Adventure · Multiplayer · Casual

A Story About My Uncle
Shared: Adventure · Indie · Platformer

Yooka-Laylee
Shared: Adventure · Indie · 3D Platformer

Fox Hime
Shared: Casual · Indie · Adventure

Melvor Idle
Shared: Casual · Indie · RPG

ATLYSS
Shared: RPG · Adventure · 3D Platformer

Forward to the Sky
Shared: Adventure · Indie · RPG

Golf With Your Friends
Shared: Casual · Indie · Multiplayer

Town of Salem
Shared: Indie · Multiplayer · RPG

Magicite
Shared: Indie · RPG · Adventure

Costume Quest
Shared: Adventure · RPG · Casual

Chinese Parents
Shared: Casual · Indie · RPG

OMORI
Shared: Indie · RPG · Psychological Horror

Tales of the Black Forest
Shared: Indie · RPG · Adventure

Journey
Shared: Adventure · Indie · Casual

Spyro™ Reignited Trilogy
Shared: Adventure · 3D Platformer · Family Friendly

Cat Quest
Shared: Adventure · RPG · Indie

Dust: An Elysian Tail
Shared: Indie · Adventure · RPG

Home Behind
Shared: Adventure · Indie · RPG