This idea seeks inspiration from the myth of King Midas and his golden touch (Midas touch) and the movie The Butterfly Effect (2004), except instead of turning things into gold, they are removed from existence. 'Minus Touch' is a psychological, story-centric RPG, in which the player controls a character gifted/cursed with the ability to delete anything from existence, permanently.

The story starts with the main character's life spiraling out of control, until they are presented with a 'gift', the ability to remove anything from existence permanently. The player interprets this as a solution to their troubles and discovers once something is erased, it never existed and is completely removed from memory except for the protagonist's. The story is centered on this gift as the player discovers there are ramifications involved and being unable to undo what is done, ultimately becomes a curse.

Mechanics:

• Dynamic storyline, changes if certain important plot points (plot heavy objects or people) are erased.
• Put the player into some psychological and immoral situations (testing their humanity)
• Strive for the happiest ending imaginable, in what could be a very emotional rollercoaster

Features:

• Replayability. Multiple endings and story paths
• Immersive story line, molded by player's choices
• Permanent player choices

Some ground rules as to what can be erased:

• Nothing too big (houses/road/earth)
• Clothing is treated as part of a person
• Playable character is immune to the effects (no self-deletion, which also includes illnesses)

I'm sure there are other important points to take into account, but these are the only ones I can think of at this time.

Intended for PC, Xbox One and Play Station 4.

Source image: http://4.bp.blogspot.com/-9XYQGsLJL28/UXA3dVCVmUI/AAAAAAAAA2Q/f-d7ABxFWPo/s1600/Brain.jpg

Relevance of image – incorporates that 'touch' aspect with the hands and the psychological choices involved shown by the brain-like appearance.