Games like Erwin's Timewarp
Games like Erwin's Timewarp include Moncage, The Legend of Bum-Bo, Chants of Sennaar, Touhou Big Big Battle, and Seen. We matched them by the tags players give Erwin's Timewarp on Steam (Indie, Early Access, Strategy, Adventure, and Puzzle): closest matches first, and among equally close ones the better-known games.

Moncage
Shared: Indie · Puzzle · Adventure

The Legend of Bum-Bo
Shared: Indie · Strategy · Adventure

Chants of Sennaar
Shared: Indie · Adventure · Puzzle

Touhou Big Big Battle
Shared: Early Access · Indie · Strategy

Seen
Shared: Indie · Adventure · Puzzle

There Is No Game: Wrong Dimension
Shared: Indie · Puzzle · Adventure

Hello Neighbor 2
Shared: Adventure · Puzzle · Action-Adventure

Sands of Salzaar
Shared: Strategy · Indie · Adventure

Polarity
Shared: Indie · Puzzle · Adventure

Bendy and the Ink Machine
Shared: Puzzle · Indie · Cartoon

Little Nightmares II
Shared: Adventure · Puzzle · Indie

The Last Campfire
Shared: Adventure · Indie · Puzzle

LIMBO
Shared: Indie · Puzzle · Adventure

BEEP
Shared: Indie · Adventure · Puzzle

Samsara Room
Shared: Indie · Adventure · Puzzle

The Scroll of Taiwu : Beyond The Dome
Shared: Indie · Strategy · Adventure

Legioncraft
Shared: Indie · Strategy · Early Access

Brothers - A Tale of Two Sons
Shared: Adventure · Indie · Puzzle

Pikuniku
Shared: Indie · Adventure · Puzzle

DemonCrawl
Shared: Indie · Strategy · Adventure

The Basement Collection
Shared: Indie · Adventure · Strategy

Mini Metro
Shared: Strategy · Puzzle · Indie

Murders on the Yangtze River
Shared: Indie · Adventure · Puzzle

Heartbound
Shared: Indie · Adventure · Early Access