Games like Inscrutable Fortress
Games like Inscrutable Fortress include Bloons TD 6, Kingdom Rush - Tower Defense, Plants vs. Zombies GOTY Edition, Kingdom Two Crowns, and Kingdom Rush Frontiers - Tower Defense. We matched them by the tags players give Inscrutable Fortress on Steam (Casual, Tower Defense, Indie, 3D, and Fantasy): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Tower Defense · Casual · Singleplayer

Kingdom Rush - Tower Defense
Shared: Tower Defense · Casual · Singleplayer

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Casual · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · Singleplayer · Fantasy

Kingdom Rush Frontiers - Tower Defense
Shared: Tower Defense · Casual · Fantasy

Rogue Tower
Shared: Tower Defense · Casual · 3D

Moncage
Shared: Casual · Indie · Singleplayer

A Dance of Fire and Ice
Shared: Indie · Singleplayer · Casual

Sizeable
Shared: Casual · Indie · 3D

ABZU
Shared: Atmospheric · Casual · Indie

Glass Masquerade 2: Illusions
Shared: Casual · Indie · Atmospheric

Librarian: Tidy Up the Arcane Library!
Shared: Casual · Singleplayer · 3D

Gorogoa
Shared: Indie · Casual · Atmospheric

Kingdom Rush Origins - Tower Defense
Shared: Tower Defense · Casual · Singleplayer

Warstone TD
Shared: Tower Defense · Indie · Fantasy

Superflight
Shared: Indie · Casual · Atmospheric

A Story About My Uncle
Shared: Indie · Singleplayer · Atmospheric

Brothers - A Tale of Two Sons
Shared: Indie · Atmospheric · Fantasy

Little Inferno
Shared: Casual · Indie · Singleplayer

Slime Rancher 2
Shared: Singleplayer · Casual · Indie

Melvor Idle
Shared: Casual · Indie · Singleplayer

The Last Campfire
Shared: Indie · Singleplayer · Atmospheric

Where Winds Meet
Shared: Singleplayer · Casual · Fantasy

Orcs Must Die!
Shared: Tower Defense · Indie · Fantasy