Nadia's Revenge is a top-down 2D pixel-based game where players fight enemies with firearms and solve puzzles to progress through the story, while making choices at branch points that lead to two different endings.

Nadia, originally an Elite Agent working for Eternal Life, a giant corporation that has created an entire virtual world within a simulation, discovers she has been betrayed by the company.

She becomes the leader of the Rebel Faction and hides within the world of the simulation to seek her revenge.

However, she is betrayed by her subordinate, Philip, causing the Rebel Faction to collapse and throwing her into great danger.

Fortunately, in a dramatic turn of events, Nadia is revived with the help of Olivia, the most powerful entity in the simulation and the enemy of Eternal Life.

Nadia sets out to reform the Rebel Faction and vows to take revenge on both the traitorous Philip and Eternal Life.

As the story progresses, Nadia acquires a variety of weapons that she uses to defeat enemies, and solves puzzles to continue her journey.

She can also send her newly recruited Rebel Agents on missions, earning SP points and gold that can be used to increase her stats and upgrade her weapons.

Ultimately, depending on her choices, she can select one of two possible endings.