Jump to content

New 8-bit and 5200 game release - Alien Assault 2121 by A/W/A


Recommended Posts

Alien Assault 2121.XEX (8-bit)

Alien Assault 2121.ROM(Atari 5200)




Alien Assault 2121 is the latest assembly language game by the team of Anschuetz/Weisgerber/Anschuetz.  This is the 5th out of 15 games that we intend to release this year.  We are going to pick up the pace during the last half of the year to make sure they all get released, so in the coming months we will probably be releasing 2 games per month.


Alien Assault 2121 is a game that has elements of both missile command and duck hunt!  We originally wrote this game in BASIC in about 1983. - one of the first games we ever wrote.  We submitted this to some magazines but it wasn't accepted.  The original BASIC version is available on Atarimania.com.  At the time, we only had a 410 cassette recorder for backup and no disk drive.  When we wrote the BASIC version, we allocated memory right on top of where Atari DOS gets loaded, so the game didn't work with disk-based systems.  We saved the program to our PC with SIO2PC about 20 years ago and placed the file on an Atari DOS 2.0 disk, but couldn't play it and the 3 of us forgot the details of the game because we couldn't play it. About 3 or 4 years ago, Robert used a utility to create a .CAS wave file so we could finally play Alien Assault it again without DOS.  Eric then re-wrote the memory issues in BASIC so we could play a version on an .ATR file.  It was a pretty good game for BASIC which featured rough parallax scrolling and featured a clever algorithm for drawing the random mountains and placing the satellites.


Be sure to read the instructions on the title page to learn how to play.  It is fairly simple, but there are two pieces of information displayed at the bottom of the screen that must be kept track of during game play.  The main object of the game is to complete as many levels as possible while increasing your score.  Each level features increasing numbers of bombs that drop from the sky that are aimed at the satellites that you are protecting - indicated by the "Bombs" count.   Each level allows fewer satellites to be destroyed before your game is over - indicated by the "Nuked" count.


Updates from the BASIC version to the Assembly version include:

·         Added instruction screen

·         Support for both the Atari 8-bit and Atari 5200

·         Custom font

·         No limit to the number of shots you can fire

·         Added a row of UFOs to the top of the playfield that can be shot

·         Added a cannon at the bottom where the shots originate from

·         Smooth scrolling horizontally instead of course scrolling

·         Added music playing in the background and sound effects

·         Smooth dropping bombs compared to choppy movement in the original

·         Much faster pace of play



  • Like 20
  • Thanks 4
Link to comment
Share on other sites

  • 3 months later...




ZeroPage Homebrew is playing the Exclusive World Premiere of both Kooky Klimber and Robot Dungeon 2121 from the programming team of Eric Anschuetz, Robert Anschuetz and John Weisgerber on tomorrow's stream LIVE on Twitch!


We also have a LIVE INTERVIEW with the A/W/A team where we will talk about the 14(!) games they released this year that are assembly updates of Atari Basic games they created in the 1980's, three of which were in Antic Magazine! Hope you can join us!




  • Like 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Recently Browsing   0 members

    • No registered users viewing this page.
  • Create New...