Games like If only
Games like If only include Firework, Poppy Playtime, Cookie Clicker, Bendy and the Ink Machine, and LIMBO. We matched them by the tags players give If only on Steam (Casual, Puzzle, Incremental, 2D, and Cartoon): closest matches first, and among equally close ones the better-known games.

Firework
Shared: Puzzle · 2D · Horror

Poppy Playtime
Shared: Puzzle · Horror · Dark

Cookie Clicker
Shared: Incremental · Casual · Horror

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

LIMBO
Shared: Puzzle · Indie · Dark

Sally Face - Episode One
Shared: Puzzle · Dark · Horror

The Room
Shared: Puzzle · Mystery · Casual

Zup! S
Shared: Casual · Puzzle · 2D

Paper Bride
Shared: Puzzle · 2D · Horror

DISTRAINT: Deluxe Edition
Shared: 2D · Indie · Horror

The Room Two
Shared: Puzzle · Mystery · Horror

Moncage
Shared: Casual · Puzzle · Indie

Gorogoa
Shared: Puzzle · Casual · Indie

Little Nightmares II
Shared: Puzzle · Horror · Dark

Zup! 2
Shared: Casual · Puzzle · 2D

Pony Island
Shared: Puzzle · Indie · Horror

Cube Escape Collection
Shared: Puzzle · Horror · Mystery

Zup!
Shared: Casual · Puzzle · 2D

Rusty Lake Paradise
Shared: Puzzle · Indie · Horror

Little Nightmares
Shared: Horror · Puzzle · Dark

Zup! F
Shared: Casual · Puzzle · 2D

The Room Three
Shared: Puzzle · Mystery · Indie

That's not my Neighbor
Shared: Casual · Horror · Indie

Horripilant
Shared: Incremental · Casual · Puzzle