Overdrive (オーバードライブ)

Overview
Overdrive (オーバードライブ) is a Japanese Yume Nikki Fangame created by Amata, who also developed Farewell and Negaigoto. The creator stated that the game was completed at ver.0.03.

Gameplay
The player starts as a girl named 323, staying in a laboratory-ish room who doesn't want to go out of it. She can travel to a world called Outer World (アウターワールド) by entering the capsule machine in the room. Her purpose is to collect all Concepts in the Outer World. You can save the game by interacting with the personal computer.

There is an unlockable character named 543, a boy that stays in a patient room and doesn't want to go out, after you find the way to meet him in Outer World. He can travel to his dream world by sleeping on the bed. He also collects Concepts in his dream world. The player can save the game by interacting with the notebook on the desk.

Controls

 * Arrow Keys - Movement
 * Z, Enter, Space Key - Interact / Select
 * X, Backspace, Insert, 0 (with Num Lock) - Open and Close Menu / Cancel
 * Shift - Concept Special Action
 * Tab Key - Back to the room
 * F12 - Back to title screen

Effects
The effects are called Concepts (コンセプト) in this game.