Parc by John Rennie is one of the lesser known of the Phoenix IBM mainframe adventures written between 1978 and 1989 and also one of the least large; I say least as that is only comparing it to monster games from the same stable like Acheton and Hezarin. It still weighs in at over 100 locations including two clever mazes (one external and one internal).
The back story (if ever these games really had them) is that you have volunteered to usurp an evil Alchemist named Ping Narott, a name which sounds like an anagram but isn't. His experiments have been making the good folk of Parcs' lives a misery. There are also 25 treasures to amass and store away somewhere inside the Alchemist's castle. Some of these treasures have dual roles as puzzle solving objects as well.
The game has the traditional excellent two word parser (TAKE ALL is allowed) and no EXAMINE command but this is seldom needed anyway as everything you need to know about an object is there for you.
Parc is atypical of the Phoenix games in so much as it has a strong chemical basis behind the plot; the usual mind bending mathematical posers conjured up by Jonathan Partington, Peter Killworth et al have been replaced by problems involving Indium, Zinc Sulphide, Radium etc.
The game takes place in three main areas: Inside the castle; West of the river and North of a chasm. Like most of these games there are a lot of one visit only areas and opportunities to miss a vital object and make the game unwinnable. Leave nothing behind as I only found one object that is never used out of about forty.
Having bashed my head against most of the Phoenix games I feel that it is one of the less difficult ones, but compared to Quondam and Xerb almost every piece of Interactive Fiction ever written would seem easier.
Richard Bos has written a .z5 file of progressive hints for Parc. I barely had to use them which is unusual for me when playing Phoenix games.
Most of the problems can be solved by lateral thinking or a visit to Wikipedia to check out the properties of a particular chemical compound, but there is one particular problem that had me stuck for ages; having seen the solution I can confidently aver I would never have deduced it between now and the Sun becoming a Red Giant and swallowing the Solar System. Suffice to say it involves an IBM 370 Mainframe computer and a FORTRAN IV Manual. Well quite. Thirty-eight year old in-jokes do pall somewhat.
I found one proper bug involving freezing an object and a few typos but nothing to affect the playing of the game itself.
There is the traditional endgame if you manage to vanquish the Alchemist and store all 25 treasures but it is something of a let down.
If you manage to stumble on a Pig's Ear in the game (and I expect you will) it means that you have screwed up and can't win. A change from Acheton's hideous voice I suppose.
Parc is of course Crap backwards but I feel that Yhtrow would be more appropriate.
I played the game via WinFrotz v 1.19. Kudos to David Kinder, Adam Atkinson and the rest of the boys for making these old games available to play on modern pcs.