Aeon Must Die! stands as a debut tactical beat ‘em-up from Limestone Games and Focus Entertainment. The action takes place within the futuristic city of Pantheon, where a protagonist shares a physical form with the deposed Emperor Aeon. Combat integrates traditional fighting game mechanics, demanding precise inputs and tactical positioning to dismantle the Void Armada. This system drives a risk-reward loop that balances destructive power against the loss of the protagonist's mental and physical autonomy.

The narrative branches through a choice-based system where sparing or killing enemies alters the story and the galaxy’s ultimate fate. Adaptive AI forces players to revise combat strategies while fighting to retain control over their mind from Aeon’s influence. Stylized visuals and an original soundtrack define the dark sci-fi atmosphere throughout the campaign. Every tactical decision dictates the protagonist's strength and the finality of the conflict.