Merger 3D casts you as a mercenary sent to destroy the Confluence project, an experiment combining plant and human cells that has escaped control. Its setting pairs jungle secrecy with bio-soldiers and a threat spreading beyond the experiment’s epicenter, giving the shooter a clear mission: break in and blast the project apart.
The game draws on classic first-person shooters, with long levels built around pushing through crowds of enemies. A large arsenal of weapons, each with unique characteristics, supplies the other central element of combat. The route through each level culminates in an unusual boss leading its group of foes, adding a distinct encounter to the repeated advance through enemy-packed spaces.
Its visual identity is described as approximately similar to Wolfenstein 3D, while its color palette takes inspiration from Operation Bodycount; the store also credits musical arrangements by Jimmy.