Games like Nostalgiarian
Games like Nostalgiarian include Pikuniku, Orion Sandbox Enhanced, We Happy Few, Starbound, and Terraria. We matched them by the tags players give Nostalgiarian on Steam (Casual, Indie, Action, Adventure, and Survival): closest matches first, and among equally close ones the better-known games.

Pikuniku
Shared: Indie · Casual · Adventure

Orion Sandbox Enhanced
Shared: Casual · Action · Indie

We Happy Few
Shared: Adventure · Action · Survival

Starbound
Shared: Survival · Adventure · Casual

Terraria
Shared: Survival · Adventure · Indie

Witch It
Shared: Casual · Indie · Action

Caster
Shared: Indie · Action · Casual

Cyberhunt
Shared: Indie · Casual · Action

Last Oasis
Shared: Survival · Action · Adventure

Home Behind
Shared: Adventure · Indie · Casual

The Forest
Shared: Survival · Adventure · Action

Juicy Realm
Shared: Indie · Action · Adventure

Wobbly Life
Shared: Adventure · Casual · Action

Rust
Shared: Survival · Adventure · Action

Don't Starve
Shared: Survival · Indie · Adventure

Palworld
Shared: Survival · Indie · Adventure

Forager
Shared: Indie · Survival · Adventure

Minimalism
Shared: Casual · Indie · Action

Dead Age
Shared: Casual · Survival · Adventure

ARK: Survival Ascended
Shared: Survival · Adventure · Action

Don't Starve Together
Shared: Survival · Adventure · Indie

Super Fancy Pants Adventure
Shared: Action · Indie · Adventure

Florence
Shared: Casual · Indie · Adventure

PUBG: BATTLEGROUNDS
Shared: Survival · Action · Adventure