Frotz-GL (frotz frontend)

After finding some old Infocom games in storage I was eager to play them again. I quickly found out about Frotz for Windows. Which is nice, but also quite “boring” to me. So over the last few weeks I was working on FrotzGL (preliminary name), a frontend to Frotz using OpenGL. So at least it looks like playing on an old computer :slight_smile:
It is already playable (even featuring a HDR renderer), but still missing some crucial features like saving and loading, and some more eye-candy features and options.
I hope to finish and release it later this year.

I am not using any engine like Unity or Unreal, everything was written from scratch, using the current version of frotz.



neat ! this would be even better than frotz in cool-retro-term :smile:


Thanks, cool-retro-term was one my inspirations, since I couldn’t find it for Windows :grin:

Cool! Would you consider replicating the noises made by the hardware? I’m thinking of keyboard clicks, the terminal bell, noises from fiddling with diskettes, the drive latches, grinding and whooshing sounds from the drives themselves, fans, and maybe a whine from the CRT’s flyback.

Also, please keep in mind portability. I’d love to see this work as a generic user interface for any IF engine or, more ambitiously, for any emulator and be usable on Windows, Mac, and Unix.

Come to think of it, looking at MAME may be helpful.


There are a few things on my to-do list:

  • retro Sounds: Keyboard, Computer, disks (I already recorded my IBM Model M Keyboard)
  • interactive Keys (at least a few of the Function Keys)

Support for more than one Interpreter is possible. The Interpreter is running in it‘s own thread and wrapped using an Interface. I might look into supporting other Interpreters once I am done with this one :slight_smile:


So, I was quite busy with work, so progress was slow. Save/Restore has been implemented, as well as some more work on the renderer (PBR+HDR added) and the text display. I added a small “DOS” frontend, you have to load games using the keyboard.
Currently I am reading a lot on GPL to get a first release ready. Binaries will be up on, sources on github.

I made two new screenshots and a small youtube video (