Games like Solheim
Games like Solheim include Thronefall, Rogue Tower, Nordhold, Tower Dominion, and Emberward. We matched them by the tags players give Solheim on Steam (Strategy, Action, Roguelite, Tower Defense, and Dark Fantasy): closest matches first, and among equally close ones the better-known games.

Thronefall
Shared: Strategy · Tower Defense · Action

Rogue Tower
Shared: Strategy · Tower Defense · Procedural Generation

Nordhold
Shared: Strategy · Tower Defense · Roguelite

Tower Dominion
Shared: Strategy · Tower Defense · Base Building

Emberward
Shared: Strategy · Tower Defense · Roguelite

Wall World
Shared: Roguelite · Strategy · Tower Defense

The King is Watching
Shared: Tower Defense · Base Building · Strategy

Black Myth: Wukong
Shared: Action · Dark Fantasy · Story Rich

Hades
Shared: Roguelite · Action · Indie

Age of Darkness: Final Stand
Shared: Strategy · Tower Defense · Base Building

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

Hades II
Shared: Action · Roguelite · Story Rich

Orcs Must Die! 2
Shared: Action · Strategy · Tower Defense

The Riftbreaker
Shared: Base Building · Tower Defense · Action

Curse of the Dead Gods
Shared: Roguelite · Dark Fantasy · Action

Lies of P
Shared: Action · Dark Fantasy · Story Rich

Orcs Must Die! 3
Shared: Strategy · Tower Defense · Action

Darkwood
Shared: Action · Adventure · Horror

Tower Factory
Shared: Strategy · Tower Defense · Roguelite

Kingdom Rush 6: Genesis TD
Shared: Strategy · Action · Tower Defense

Taur
Shared: Strategy · Action · Tower Defense

Rock 'N' Roll Defense
Shared: Strategy · Tower Defense · Action

Deathtrap
Shared: Action · Strategy · Tower Defense

Necrosmith 2
Shared: Strategy · Tower Defense · Roguelite