In Achievement Hunter: Unicorn, players control a fearless protagonist armed with various real weapons, tasked with defending their city from an alien invasion. The gameplay focuses on skill development and weapon upgrades as players face off against numerous enemies.

The storyline of Achievement Hunter: Unicorn revolves around a lone hero determined to thwart the aliens' plans to destroy his city, emphasizing themes of bravery and resilience in the face of overwhelming odds.

Achievement Hunter: Unicorn stands out with its impressive feature of 5,000 achievements, providing players with a vast array of goals to accomplish, alongside its low price point, making it accessible to a wide audience.