90 lines
3.6 KiB
Text
90 lines
3.6 KiB
Text
= advent(6) =
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:doctype: manpage
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// SPDX-FileCopyrightText: (C) Eric S. Raymond <esr@thyrsus.com>
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// SPDX-License-Identifier: CC-BY-4.0
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== NAME ==
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advent - Colossal Cave Adventure
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== SYNOPSIS ==
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*advent* [-l logfile] [-o] [-r savefile] [-a savefile] [script...]
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== DESCRIPTION ==
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The original Colossal Cave Adventure from 1976-1977 was the origin of all
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later text adventures, dungeon-crawl (computer) games, and computer-hosted
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roleplaying games.
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This is the last version released by Crowther & Woods, its original
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authors, in 1995. It has been known as "adventure 2.5" and "430-point
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adventure". To learn more about the changes since the 350-point
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original, type 'news' at the command prompt.
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There is an 'adventure' in the BSD games package that is a C port by
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Jim Gillogly of the 1977 version. To avoid a name collision, this game
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builds as 'advent', reflecting the fact that the PDP-10 on which the
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game originally ran limited filenames to 6 characters.
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This version is released as open source with the permission and
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encouragement of the original authors.
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Unlike the original, this version has a command prompt and supports
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use of your arrow keys to edit your command line in place. Basic
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Emacs keystrokes are supported, and your up/down arrows access a
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command history.
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Some minor bugs and message typos have been fixed. Otherwise, the
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"version" command is almost the only way to tell you're not running
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Don's 1977 version until you get to the new cave sections added for
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2.5.
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To exit the game, type Ctrl-D (EOF).
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There have been no gameplay changes.
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== OPTIONS ==
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-l:: Log commands to specified file.
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-r:: Restore game from specified save file
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-a:: Load from specified save file and autosave to it on exit or signal.
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-o:: Old-style. Reverts some minor cosmetic fixes in game
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messages. Restores original interface, no prompt or line editing.
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Also ignores new-school one-letter commands l, x, g, z, i. Also
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case-smashes and truncates unrecognized text when echoed.
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Normally, game input is taken from standard input. If script file
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arguments are given, input is taken from them instead. A script file
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argument of '-' is taken as a directive to read from standard input.
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== BUGS ==
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The binary save file format is fragile, dependent on your machine's
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endianness, and unlikely to survive through version bumps. There are
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version and endianness checks when attempting to restore from a save.
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The input parser was the first attempt *ever* at natural-language
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parsing in a game and has some known deficiencies. While later text
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adventures distinguished between transitive and intransitive verbs,
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Adventure's grammar distinguishes only between motion and action
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verbs. Motions are always immediate in their behavior, so both ACTION
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MOTION and MOTION ACTION (and even MOTION NOUN and MOTION MOTION) are
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invariably equivalent to MOTION (thus GO NORTH means NORTH and JUMP
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DOWN means JUMP). Whereas, with actions and nouns, the parser collects
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words until it's seen one of each, and then dispatches; if it reaches
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the end of the command without seeing a noun, it'll dispatch an
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"intransitive" action. This makes ACTION1 ACTION2 equivalent to
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ACTION2 (thus TAKE INVENTORY means INVENTORY), and NOUN ACTION
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equivalent to ACTION NOUN.
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Thus you get anomalies like "eat building" interpreted as a command
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to move to the building. These should not be reported as bugs; instead,
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consider them historical curiosities.
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== REPORTING BUGS ==
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Report bugs to Eric S. Raymond <esr@thyrsus.com>. The project page is
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at http://catb.org/~esr/open-adventure
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== SEE ALSO ==
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wumpus(6), adventure(6), zork(6), rogue(6), nethack(6).
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