Games like SEIKEN-MANIFESTIA
Games like SEIKEN-MANIFESTIA include Total War: WARHAMMER II, Total War: WARHAMMER III, Call to Arms - Gates of Hell: Ostfront, Company of Heroes 3, and Kingdom Rush - Tower Defense. We matched them by the tags players give SEIKEN-MANIFESTIA on Steam (RTS, Real Time Tactics, Strategy, PvE, and Singleplayer): closest matches first, and among equally close ones the better-known games.

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

Total War: WARHAMMER III
Shared: Strategy · RTS · Real Time Tactics

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

Company of Heroes 3
Shared: Strategy · RTS · Singleplayer

Kingdom Rush - Tower Defense
Shared: Strategy · Singleplayer · 2D

Aliens: Dark Descent
Shared: Strategy · RTS · Real Time Tactics

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

Total War: THREE KINGDOMS
Shared: Strategy · RTS · Real Time Tactics

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Singleplayer · 2D

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

Kingdom Rush 5: Alliance TD
Shared: Strategy · Singleplayer · 2D

Battlefleet Gothic: Armada (Classic)
Shared: RTS · Strategy · Real Time Tactics

Shadow Tactics: Blades of the Shogun
Shared: Strategy · Real Time Tactics · Singleplayer

Element TD 2 - Tower Defense
Shared: Real Time Tactics · Strategy · PvE

Men of War: Assault Squad 2
Shared: Strategy · RTS · Real Time Tactics

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

Mindustry
Shared: RTS · Strategy · Tower Defense

Company of Heroes
Shared: RTS · Strategy · Singleplayer

GemCraft - Chasing Shadows
Shared: Strategy · Singleplayer · Action

Shadow Tactics: Aiko's Choice
Shared: Real Time Tactics · Strategy · RTS

Warhammer 40,000: Dawn of War - Definitive Edition
Shared: RTS · Strategy · Singleplayer

Kingdom Rush Vengeance - Tower Defense
Shared: Strategy · Singleplayer · 2D

Bloons TD 6
Shared: Strategy · Singleplayer · Tower Defense

Door Kickers
Shared: Strategy · Singleplayer · Action