Rance 4.1 and Rance 4.2 are two parts of the same storyline, and use the same mechanics and artstyle. Part of the game involves navigating the Happiness Pharmaceutical office and Romance Park, speaking with people, and investigating the surroundings through an adventure game menu. The other part is a dungeon-crawler taking place in the Angel Army secret underground base. Within the base, there are specific rooms where the player can interact with the environment, use healing items, and load/save. The rooms are connected to each other by thin routes, where the only available actions are "Advance" and "Retreat", to take a step forwards or backward. (Most routes are about 3-5 steps long). These paths are the spots where random encounters can occur. When the game starts, the base is unmapped, and paths are marked on menus as "???". Each time the player crosses a path and enters a new room, Athena 2.0 will draw the room on the map (with a short dialogue among the party Rance about how to name and illustrate it; sometimes giving comical or non-indicative names). If Athena is not present, Rance will try to draw the map himself. The "???" option will change to reflect the room name. Some paths are hidden or trapped, and can only be crossed later in the game.