Beyond Citadel casts the player as the “Martyr,” a last resort sent by the Seven Angels after the Citadel, humanity’s final stronghold, has fallen. Guided by a mysterious signal, the Martyr sets out to overthrow the Trumpeters of the Apocalypse and uncover the truth buried beneath the fortress. This grim, apocalyptic premise gives the journey a clear purpose: resistance, discovery, and survival in a world under hostile control.
Its foundation is a single-player first-person shooter inspired by 1990s FPS classics, rendered in anime-style 2.5D graphics. Gunplay emphasizes varied handling: the arsenal ranges from black-powder firearms to futuristic energy weapons, while weapons lose condition as they are fired and may jam. The game also describes hand-crafted indoor and outdoor levels, skill acquisition through exploration, and opposition spanning foot soldiers, armored vehicles, and hostile creatures. Allies provide support along the way, set against destructive effects and a dark futuristic atmosphere.
The game’s distinctive mix of classic-FPS inspiration, anime-style presentation, and weapon maintenance gives that journey its own identity, while the single-player format explains why its activity is best considered as a single-player game rather than a measure of concurrent group play.
