Seen on Twitter (the tweet was deleted, but it’s still available on archive.org). This DVT-3 model is unique because it includes a well-known game absent from the commercial versions: Tetris.
The screenshot shows Block0 (likely Brick), Chopper (Parachute), Klondike (Solitaire), and Stacker, which is a Tetris clone.
DVT-3
Beta OS
Unexpected games
Stacker, aka Tetris
