- Spiritual Adaptation: Due to the game's nature in terms of gameplay, this is the closest thing to a new Front Mission (more precisely, a new Front Mission: Alternative).
- Older Than They Think: This isn't the first time Vanillaware developed a RTS title.
- Tainted by the Preview: When Atlus showed a preview of the combat system on July 2019, the game was revealed to be part Real-Time Strategy. This led to negative reactions from most fans of the company, who were expecting the game to be an action RPG in the same vein as Odin Sphere, Muramasa: The Demon Blade and Dragon's Crown, which are Vanillaware's most well known titles. It also includes a great deal of 3-D modeling, rather than the companys signature, beautifully detailed sprite work throughout, and the character and art design seems to be downbeat and realistic, in contrast to their usual artstyle.
YMMV / 13 Sentinels: Aegis Rim