There’s a first party PSP release which that I’m confident less than a hundred people played: Influence.
INFLUENCE | プレイステーション® オフィシャルサイト (playstation.com)
This is a puzzle game designed by Masahiko Sato, the designer of Intelligent Qube, but it seems it was sent to die, released as a digital only PSP game for 800 yen in Japan with very little fanfare, and rebranded into a PlayStation Minis game for its western release.
With basically nothing written about it, I decided to purchase it yesterday and played about an hour today…it’s certainly interesting but maybe on the wrong system.
Simply put, you pick a character, then hop around a 3x3 grid which happens to be populated by cubes of varying stacks. If you press the shoulder buttons you can expand/shrink your field of ‘influence’, which, when activated, eliminates any cubes that it encompasses. The catch is, any empty space that resided within your field of influence becomes a cube on the other side of the map, so you’ve basically got to come up with the optimal number of moves to eliminate all cubes.
It’s pretty clever - almost too clever for its own good - and I think it’s the sort of game you have to keep coming back to regularly so it slowly clicks. Right now I’d be lying if I said I wasn’t clearing half of the stages without trial and error rather than looking at the map and thinking about my next best move.
Honestly this sort of game would just work much better on the 3DS or VR. It’s quite hard trying to read the play field since it’s an isometric set of floating cubes, and while you can move the field using the analogue stick the whole thing is a bit reminiscent of trying to play Crashmo or Fallblox on 3DS without the 3D on, it’s possible but there’s a lot of visual noise that comes with not being able to parse everything in a proper 3D space.