Zarf Updates

Welcome to June. The latest from the Visible Zorker project: Visible Deadline!

As usual, the source code repository is also live, licensed with the open-source MIT license.

Deadline was Infocom's first non-Zork game, and they pulled out all the stops to make it feel like a new and different thing. Which made my job a lot more interesting!

For a start, Deadline's "feelies" were absolutely integral. When I bought Zork 2 and Zork 3, back in the day, I was basically able to throw the manual aside and jump straight into the game. (I'd already learned how the parser worked, and what else was there?) But Deadline came with a full police dossier introducing the murder scene: the coroner's report, interviews with the suspects, a little envelope containing a "sample" of the pills that did for Mr. Robner.

Visible Deadline wouldn't make sense without these documents. So I've included images in the "Feelies" tab. These are scanned directly from the copy of Deadline that I played as a kid! Except that my pills have crumbled to moldy crud over the decades.

I've posted the original, high-resolution images from this scan session on the Internet Archive. I'm not the first person to do this, of course; here's a set of scans from the Atari Deadline package. However, that's missing the interviews, and also I was able to do full 600dpi scans. So now you have both.

On the technical side, Deadline made an enormous leap: all of the game's NPCs were autonomous agents. Over the game's twelve-hour timeline, each character moved around the mansion on their own schedule. They could also react to your investigation. Certain questions or revelations would send characters running off to confer, conspire, destroy evidence, or (in the worst case) commit another murder. (When will these people learn that crime never pays?)

All of this required a pile of brand-new NPC navigation code. I've exhibited this in two ways:

• The "Schedule" tab shows each character's current movement goal, as well as the daily schedule for the whole crew. It's a pretty complicated system. I've included a full explanation as I understand it.
• The "Map" tab shows NPC routing paths and sightlines. The blue paths are internal tables which allow a character to move to a desired destination. The pink lines allow you to see a character in adjacent rooms down the hall.

(The routing logic is referred to as the "T system" in the source code, after the transit system that serves Boston and Cambridge. Infocom will always have its home-town in-jokes.)

Other than that stuff, this game runs pretty much like the previous Visible Infocom titles. Objects, functions, global variables, verb grammar. Enjoy browsing!

I guess I should also note that Deadline has not been licensed as open source by Microsoft. So I am somewhat jumping the gun by taking the Visible Zorker to this milestone. But it's where I started, and it's what I said I would do. So we're doing it. I don't really expect problems; we're all fans here.

More readings on Deadline:

• The Digital Antiquarian
• Drew Cook
• Jason Dyer

Upcoming work:

Visible Starcross will be the next public release on July 1st.

Patreon supporters got access to Visible Starcross a month ago, and Visible Suspended today.

Speaking of which, here's my recreation of the Suspended map. And my high-res scans of the original map and manual.

I've decided not to skip June after all. NarraScope is coming in on schedule; it hasn't required the last-minute burst of emergency work that I feared. So the monthly releases will remain on track. I'll tackle the next early-access game, The Witness, as soon as the conference wraps up. Patreon supporters will see it on July 1st.

See you next month!