Games like Skyward Bastion
Games like Skyward Bastion include Rogue Tower, Bloons TD 6, Emberward, Thronefall, and Wall World. We matched them by the tags players give Skyward Bastion on Steam (Strategy, Tower Defense, Roguelite, Singleplayer, and Isometric): closest matches first, and among equally close ones the better-known games.

Rogue Tower
Shared: Strategy · Tower Defense · Procedural Generation

Bloons TD 6
Shared: Strategy · Tower Defense · Singleplayer

Emberward
Shared: Tower Defense · Strategy · Roguelite

Thronefall
Shared: Strategy · Tower Defense · Isometric

Wall World
Shared: Roguelite · Tower Defense · Strategy

FTL: Faster Than Light
Shared: Strategy · Singleplayer · Indie

Nordhold
Shared: Strategy · Tower Defense · Roguelite

Tower Dominion
Shared: Strategy · Tower Defense · Roguelite

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

GemCraft - Chasing Shadows
Shared: Strategy · Tower Defense · Singleplayer

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Singleplayer

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

Balatro
Shared: Strategy · Singleplayer · Roguelite

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · Singleplayer

Kingdom Two Crowns
Shared: Tower Defense · Strategy · Singleplayer

Slay the Spire
Shared: Strategy · Singleplayer · Roguelite

Isle of Arrows
Shared: Tower Defense · Strategy · Roguelite

CloverPit
Shared: Roguelite · Strategy · Singleplayer

Artisan TD
Shared: Strategy · Tower Defense · Singleplayer

Hades
Shared: Roguelite · Singleplayer · Indie

Dungeon of the ENDLESS™
Shared: Strategy · Tower Defense · Indie

Sir, We Have an Orc Problem
Shared: Tower Defense · Roguelite · Strategy

Hexguardian
Shared: Tower Defense · Roguelite · Strategy

Age of Darkness: Final Stand
Shared: Tower Defense · Strategy · 3D