Saint Slayer: Spear of Sacrilege takes players back to the year 1698, where they embark on a quest as Rudiger, an ex-soldier turned farmer, tasked with stopping the relic-stealing Father Pacer. This action-packed game features a robust 21-stage single-player campaign that can also be enjoyed in two-player co-op mode. Players will encounter stunning NES-era pixel art and an atmospheric 8-bit chiptune soundtrack that enhances the immersive experience.

The game challenges players with seven intense boss fights and the opportunity to befriend animal familiars, unlocking upgrades and bonuses along the way. With choices that impact gameplay, players can opt to help or hinder those they meet, making each playthrough unique. The game encourages multiple runs with its challenges and password system, ensuring a replayable and engaging experience.