A free app for Windows, by Luciferdiva.

The Phase 4 An Institute Expansion is a role-playing game in which you can explore the expansive biomes of the Institute, create your own cybernetic body, craft new weapons and armor, and much more. 

In Phase 4, you can also interact with many different objects and areas. You can explore the interactive world map and interact with different objects. You can also explore and interact with the different biomes of the Institute, such as the Living Library, the Biosafety Level 3 Contamination Lab, the Research Facility, the Synth Zoological Initiative Area, the Security Level, the Reclamation Area, the Diving Area, and the Cybernetics Area.

The goal of this game is to complete the different missions that you encounter and to explore the different biomes of the Institute. 

In Phase 4, you can upgrade your cybernetic body with new weapons and armor. You can also use a special ability.