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Submitted by Aaron Pfeiffer, posted on May 24, 2001

Image Description, by Aaron Pfeiffer

Here are a few angles of a game I just completed, called Antris. Antris is sort of the dual to Tetris, in that the roles of the player and the computer are reversed. In this game the player constructs the pieces, and the computer attempts to fit them in. Since the roles are reversed, the goals are also reversed. You lose points for horizontal collapses, and beat the levels by forcing the computer into a situation where it can't fit any more pieces. If the computer survives until time expires, you lose.

  • OpenGL rendering, with texturemaps
  • 3D everything: buttons, menus, board, and pieces
  • Fancy transition effects for menus and the board
  • Free-look camera (use the W,S,A,D and arrow-keys to move)
  • Sound effects
  • Solver for Tetris moves
  • Demo mode, where the computer plays against itself
  • Two difficulty settings
  • Five levels, each with a different block texture scheme
  • With all the times you lost to Tetris, wouldn't you like some revenge?

    Revenge available at:

    Aaron Pfeiffer

    [Currently seeking employment in graphics and games!]

    Image of the Day Gallery


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    Archive Notice: This thread is old and no longer active. It is here for reference purposes. This thread was created on an older version of the flipcode forums, before the site closed in 2005. Please keep that in mind as you view this thread, as many of the topics and opinions may be outdated.

    May 24, 2001, 04:08 PM

    Im first......yeeee hah!
    Nice image/idea.


    May 24, 2001, 04:26 PM

    Nice idea? Great idea! :)
    It looks pretty neat too, although some of those camera angles you made screenshots of seem pretty awkward to play the game with. =)


    May 24, 2001, 04:37 PM

    Great ideat ! ;-))

    After so many boring tetris clones, this one got me interested again, the idea is really cool. Also, the presentation looks pretty cool, too !



    May 24, 2001, 04:46 PM

    In general, I would say it's good/cool/new idea.


    Why not call it "tetris in a box" or "very cool tetris" or "innovation presentation".

    Of course, many of us have noticed that they suddenly want to look at tetris from different angle. Or just maybe they interested in "what's behind tetris ?". Now you can rotate tetris-book and even look at other side, where, for example you could put commercial advertisement or smth similar.

    That's wery perspective idea, I would say ...

    Vander Nunes

    May 24, 2001, 04:48 PM

    While entering in the iotd, i was thinking "ugh, another tetris"... what a surprise, Antris is quite original. I will try the demo soon. Nice idea!


    May 24, 2001, 04:49 PM

    awesome idea, and an IOTD with source code! nice.

    Navreet Gill

    May 24, 2001, 05:50 PM


    How does the AI work? is it pretty easy to beat? or does it take a bit of work?

    Navreet Gill

    May 24, 2001, 05:51 PM


    How does the AI work? is it pretty easy to beat? or does it take a bit of work?

    zed zeek

    May 24, 2001, 06:06 PM

    it looks very polished. no aliasing problems with the text at all

    Aaron Pfeiffer

    May 24, 2001, 07:11 PM

    The AI considers the piece you have created, and seeks a place to put it that tries to minimize height added, minimize holes underneath, and maximize the number of rows collapsed. It does not consider future moves, only the current piece. It will rotate and translate the piece in search of a good position. Most the effort in this project went into making it challenging -- but not impossible.

    Difficulty is injected by restricting the number of blocks you can use to construct a piece, and disallowing pieces that have single pieces (except for the 1-block piece).

    If you leave the game sitting for a bit (about 25 seconds) on one fo the game choice screens (where you choose easy/hard), it'll start playing against itself, too (though it starts to cheat then).

    Christian Schüler

    May 24, 2001, 07:16 PM

    Run smoothely on my humble

    AMD K6 233, 64MB, Voodoo-I

    Jesse Chounard

    May 24, 2001, 07:38 PM

    It's a very interesting idea. I really like the text, it looks very nice.

    I don't like the way the pieces fall, though. They sometimes pass right through other pieces which wouldn't happen in Tetris. (You'd have to move to the left, then go down. In Antris, the piece goes down-left through other pieces sometimes.) That doesn't really take anything away from the game though, and it is quite fun.

    Is the number of blocks allowed for the next piece decided randomly?


    Aaron Pfeiffer

    May 24, 2001, 08:31 PM

    Yeah, the number for the next piece is random within a range. This range is tighter and smaller if you play on the 'hard' setting. The game actually has several trivial solutions if you are not restricted to pieces of size 2 or 3 once in a while.

    Hannu K.

    May 24, 2001, 08:37 PM

    76130 on easy, yippee :)


    May 24, 2001, 10:15 PM

    just to let you know, they have a copyright on ending a game name with -tris.

    Tim Wojtaszek

    May 24, 2001, 10:20 PM

    Well, sinces its actually the reverse he could change it to sirtet...but then he loose the whole anti- angle. However, this all begs the question how you can copyright word endings?


    May 24, 2001, 10:44 PM

    Actually, it's a trademark on words ending in -tris. They have protected it quite fiercely in the past. The thing is, with games that play exactly like the original Tetris, except have some other name, like "Appletris", they have a case for trademark dillution. Antris probably falls in that gray area but they'd probably issue a C&D anyway.

    Very fun game, quite addictive. Now I just need to port it over to Linux so I can play it on my main box.



    May 24, 2001, 10:57 PM

    H-ass-bro did that? That's kinda stupid imo. Maybe copyrighting the exact name, but not ALL -tris. Hmmm, somebody should make a tetris game, where the blocks show pictures of ladys (not porn, just pictures of ladys) as they fall down and name the game Mistris just to spite Hasbro:D First ideas, then names, pretty soon Hasbro will sue for just making games.

    Nice looking game and a great idea too!



    May 24, 2001, 11:47 PM

    That sounds almost exactly like the AI I used in my own tetris game.

    Oh, and you could call it Antrix if you are worried about copyrights, then again that might be too close to Actrix...

    Very nice idea btw, it's one of those "Why didn't I think of that" days.

    Aaron Pfeiffer

    May 25, 2001, 12:00 AM

    Interesting. Originally I had called it Antiris rather than Antris, to get the 'Anti' in there, but then I accidentally misnamed it Antris in a bunch of my texture maps. I figured it was easier to change the name than change the art. Now I get to do both!


    May 25, 2001, 05:59 AM

    Just wondering, if it's true - how did they get to copyright it? Isn't tetris a russian game?

    Kasper Fauerby

    May 25, 2001, 06:15 AM

    First of all - very nice idea! That's a twist on tetris I never saw before ;)

    Secondly - come on, you can't be serious? They hold copyright on EVERY word ending in -tris? That GOTTA be impossible, even in America - the land of trademarks ;)


    May 25, 2001, 07:24 AM

    Just played it very fun :)

    I'd have to agree with the other guy why didn't I think of that before?

    Rui Martins

    May 25, 2001, 07:25 AM

    Nice Original Ideia, fun game!

    You could just rename it to "Antrix", instead of "Antris"

    See ya


    May 25, 2001, 12:27 PM

    Nicely done, although it seems to be possible to win every time (I did at least two levels in a row) by making the same Z shaped block each time.


    May 25, 2001, 12:36 PM

    "Innovation Presentation"!?!? When was the last time you got out? I think "Teris' Revenge" or something along those lines would be cool but "Innovation Presentation"? I know if I was walking down the games aisle at CompUSA and saw a game called "Innovation Presentation" I would inform the manager that a "productivity" application had been accadentally misplaced into the games section. And any game with a name like that certainly wouldn't be at the top of my Christmas list.


    May 25, 2001, 12:45 PM

    Brilliant idea! I like it! Good job!

    Warren Marshall

    May 25, 2001, 12:46 PM

    Dude, he's a regular troller. Just ignore him and move on.


    May 25, 2001, 12:46 PM

    Oh yeah, and DON'T call it "Innovation Presentation"! Do yourself a favor! :-)


    May 25, 2001, 02:40 PM

    I LIKE IT!!

    Anyway PEOPLE listen....

    Yes, Innovation Presentation is not a really good name.

    TETRIS REVENGE is a cool name but WATCH OUT FOR TRADEMARK INFRINGEMENT although I dont think there can be any since PAJITNOV and MICROSOFT didn't trademark it BUT OF COUSE I AM WRONG BAH but pajitnov should have gotten more MONEYS whiich perhaps will happen THIS TIME AROUND well YEAH baby YEAH.


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