The SD-8516 Summer Game Jam is an exciting opportunity for retro computing enthusiasts, hobbyist developers, and fans of 1970s/1980s arcade and home console classics to create games for the SD-8516 platform!

The SD-8516 is a retro-inspired virtual/fantasy computer system designed in the spirit of classic 8/16-bit machines like the Commodore 64 and the SNES. It supports programming in:

• Stellar BASIC
• Star Forth (a FORTH implementation)
• Assembly Language

Documentation, including the User's Guide, Programmer's Reference Guide, language tutorials, and example programs, is available at: https://appledog.ca (check the wiki sections for SD-8516 specifics).

1. Developer Beta Phase (April–May 2026)

• Sign up for early/beta access to the SD-8516 system by sending a private message (DM) to me on Reddit (u/AppledogHu) or via Discord.

During this 1–2 month window, you'll explore the hardware, learn the programming environments, experiment, and decide on your game. There is no obligation.

2. Game Proposal Submission

• Submit a game proposal; the game name, what language (BASIC, FORTH or Assembly), and some information about your game (i.e. what kind of game it is).

The proposed game must be a version of a classic home console or arcade game from the 1970s or 1980s – (think Space Invaders, Pac-Man, Asteroids, Donkey Kong, Jumpman, Loderunner, and so on! Get creative within the constraints of the platform!).

Proposals will be reviewed, and accepted entrants will be notified.

3. Development Phase (June–July 2026)

• Accepted developers get 60 days to complete and polish their game.

• During this time I will make myself available to answer questions about the development environment. I will be on discord, reddit, and you can send me e-mail.

• Overall Best Game: $1,000 USD
• 2nd Place: $500 USD
• 3rd place 'Best in Category' (one each):
  • Best BASIC game: $200 USD
  • Best FORTH game: $200 USD
  • Best Assembly Language game: $200 USD

Prizes awarded based on creativity, playability, faithfulness to the retro inspiration, technical execution on the SD-8516, and overall fun factor. Judging details will be shared closer to submission.

• By entering and accepting a prize, winners grant distribution rights to Appledog for publishing the games on our webpage (appledog.ca) as part of this paid contest. You retain your own distribution rights as well.
• This is a community-focused jam to celebrate retro computing, retro programming and share cool projects with each other!

1. Keep an eye on our Discord, Reddit and Wiki for updates, beta access announcements, proposal templates/examples, and more!

If you're interested in the beta or have questions, send me a private message! I'm here to answer your questions.

Who's ready to code some pixel-perfect retro magic? Show me your power!

(Feel free to crosspost to relevant subreddits like r/retrocomputing, r BASIC, r/Forth, r/assembly, r/gamejams, etc., with credit if desired.)