2048 Numberwang
<p><pre><code>    C:\> TWENTY48
    Loading...
    Ready.

    You are in a darkened room. On the floor in front of
    you are sixteen tiles, arranged in a grid.  The tiles
    are labelled A1, A2, A3, A4, B1 and so on up to D4.

    There is a two here, on tile A1.
    There is a two here, on tile D3.

    > GET ALL
    The numbers appear too strongly glued to the tiles.

    > INVENTORY
    You have a copy of On Lisp by Paul Graham, a thing your 
    Aunt gave you that you don't know what it is, and a 
    small leaflet.

    > READ ON LISP
    Time passes. You have a profound enlightenment experience.  
    Sadly, this does not help you win the game.
    
    > READ LEAFLET
    "WELCOME TO TWENTYFORTYEIGHT!

    TWENTYFORTYEIGHT is a game of numbers, addition and high 
    bits. In it you will explore some of the most tedious 
    territory ever seen by Hacker News readers. No computer 
    will be without one!"

    > GO LEFT
    Some numbers move, and a new number appears!

    There is a two here, on tile A1.
    There is a two here, on tile C1.
    There is a two here, on tile D1. [Footnote 6]

    > FOOTNOTE 6
    There are no footnotes.

    > GO UP
    Some numbers move, some change, and some new numbers 
    appear!

    There is a four here, on tile A1.
    There is a two here, on tile B1.
    There is a two here, on tile D4.

    >GO DOWN
    Some numbers move, and a new number appears!
    
    There is a four here, on tile C1.
    There is a two here, on tile C4.
    There is a two here, on tile D4.
    There is a two here, on tile D1.

    >PANIC
    Not surprised.

    >QUIT
    Amazed you survived this long.

    Your score is 4, out of a possible umpty squillion and six.
    Good bye!

    C:\>
    C:\>
    C:\> DEL TWENTY48.EXE
    C:\></code></pre>