Games like The Final Bastion
Games like The Final Bastion include Age of Darkness: Final Stand, Thronefall, DG2: Defense Grid 2, Element TD 2 - Tower Defense, and Total War: WARHAMMER III. We matched them by the tags players give The Final Bastion on Steam (Tower Defense, PvE, RTS, Action, and Stylized): closest matches first, and among equally close ones the better-known games.

Age of Darkness: Final Stand
Shared: Tower Defense · RTS · PvE

Thronefall
Shared: Tower Defense · Strategy · Action

DG2: Defense Grid 2
Shared: Tower Defense · Action · Strategy

Element TD 2 - Tower Defense
Shared: Tower Defense · PvE · PvP

Total War: WARHAMMER III
Shared: RTS · Strategy · Action

Total War: WARHAMMER II
Shared: RTS · Strategy · Action

Stronghold Crusader: Definitive Edition
Shared: Strategy · Tower Defense · Medieval

Mindustry
Shared: Tower Defense · RTS · Strategy

Stronghold: Definitive Edition
Shared: Strategy · RTS · Medieval

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

Creeper World 4
Shared: Tower Defense · RTS · Real Time Tactics

Men of War: Assault Squad 2
Shared: RTS · Strategy · Action

Cossacks 3
Shared: RTS · Strategy · PvP

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · PvP · Strategy

Warhammer Age of Sigmar: Realms of Ruin
Shared: RTS · Action · Strategy

Stronghold HD (2012)
Shared: Tower Defense · Medieval · Real Time Tactics

A Total War Saga: THRONES OF BRITANNIA
Shared: RTS · Strategy · Action

Call to Arms - Gates of Hell: Ostfront
Shared: RTS · Strategy · Real Time Tactics

Company of Heroes 3
Shared: RTS · Strategy · PvE

Planetary Annihilation: TITANS
Shared: RTS · Strategy · Real Time Tactics

Total War: THREE KINGDOMS
Shared: Strategy · RTS · PvP

Demigod
Shared: PvP · PvE · RTS

Age of Mythology: Retold
Shared: RTS · Strategy · PvE

Stronghold Crusader HD (2012)
Shared: Medieval · Real Time Tactics · Strategy