Sid Meier's Civilization 64bit 1.2

Sid Meier's Civilization 64bit 1.2: the 1992 Sid Meier's Civilization for Windows (the 16-bit
Windows 3.1 release), native on 64-bit Windows, with an on-the-fly switch to the graphics of
Civilization for DOS. Version 1.2 makes windowless play fill the whole window.

AI assistance and disclaimer of liability. This program was made with the assistance of
Anthropic's Claude AI, under my direction, and I tested it myself. It may contain errors that were
not found. It is provided "as is", without warranty of any kind, express or implied; you use it
entirely at your own risk, and I accept no liability for any damage, data loss or other harm
arising from its use. Back up your game files and saved games first.

Sid Meier's Civilization, its program, art, sound and data belong to their owners. This is a fan
project, not affiliated with or endorsed by Firaxis Games, 2K, Take-Two Interactive or MicroProse.
You need your own copy of the game.

Download

civ64.exe (below): one 64-bit program, no installer. SHA-256
92d4c8408f1043fcff8b3acc84ac975891d05161262c3459191cf7569a2d1a91, 5,005,824 bytes.

New since 1.1

Windowless play fills the whole window (both graphics). With Display > Windowless play on,
the picture (the menu bar across the top, the World Map and the Status panel on the left, the map
beside them) now covers the whole window or screen, without the black border that 1.1 left around
it. civ64 makes the game's map window larger by the frames, captions and scroll bars it leaves out,
so the map shows a little more land; switching windowless play on or off resizes the map window
accordingly, just as if you had resized the window yourself. The Status panel still reaches the
bottom, and everything else about windowless play is as in 1.1.

Version 1.2. The file's version information (Properties > Details) and the About box now say
1.2 (1.1 still said 1.0).

Everything from 1.1 and 1.0

Windowless play, 4:3 for the DOS gameplay, CRT scanlines and your own music and sound effects
(v1.1); the whole original game from the
intro to the end games, recovered from the original machine code, with the DOS graphics profile
(Ctrl+Shift+Backspace) for the same running game
(v1.0).

Requirements

• Windows 10 (version 1607 or later) or Windows 11, 64-bit.
• Your own copy of Sid Meier's Civilization for Windows, all of its files. civ64 accepts exactly
  one release: civ.exe of 832,512 bytes, SHA-256
  a66ec64020f10adb81613964f3d08a11ea278b6a5a060c8e49d1ea1fd3ba1788.
• Optional, for the DOS graphics: your own copy of Civilization for DOS 475.01 (CIV.EXE of
  305,030 bytes).
• Optional, for other music and sound effects: your own WAV files.

How to start

1. Put civ64.exe in a folder of its own.
2. Next to it, put a CivWin folder with a copy of your Civilization for Windows files, or a ZIP of
   them named CivWin.zip. For the DOS graphics, add a CivDos folder or CivDos.zip. For your own
   sounds, add a MusicSfx folder or MusicSfx.zip.
3. Run civ64.exe. Without game files next to it, civ64 asks you to locate the game's civ.exe or
   ZIP and remembers your choice.

Upgrading from 1.0 or 1.1: replace civ64.exe; your settings and saves stay.

The User Guide explains every
menu, key and option.

Known limits

• This release's change passed the project's automated build and test cycle (build, suite and
  EXT_G1 green, test_wl 93 checks); the author's own visual check of the borderless picture was
  still open at release time.
• The new features change only what you see and hear, never the game's rules: the same game,
  computer players and saves with or without them. (Windowless play now changes the size of the
  game's map window, as resizing the window does.)
• Not reproduced (unchanged from 1.0): the original Help file (Windows 10 and 11 cannot show
  .hlp files), the speed of a 1992 PC, and same-seed replay in step with the original. The
  fidelity register lists every
  difference (F1 to F340).

What is not included, and why

• No game files, no music or sound files. None of the original games' files or bytes are in
  civ64.exe or in the repository. civ64 reads your own copy at run time and checks that it is the
  supported release.
• No source code in this release. The recovered C of the original program and the game core
  translated from it are readings of the copyrighted original, so they are not published. civ64's
  independently written code will be published in the repository later; on its own it does not
  build a playable game.

The full story of the work, its tests and measured data:
docs/README.md.

Sid Meier's Civilization 64bit 1.1

Sid Meier's Civilization 64bit 1.1: the 1992 Sid Meier's Civilization for Windows (the 16-bit
Windows 3.1 release), native on 64-bit Windows, with an on-the-fly switch to the graphics of
Civilization for DOS. Version 1.1 adds windowless play, 4:3 for the DOS gameplay, CRT scanlines and
your own music and sound effects.

AI assistance and disclaimer of liability. This program was made with the assistance of
Anthropic's Claude AI, under my direction, and I tested it myself. It may contain errors that were
not found. It is provided "as is", without warranty of any kind, express or implied; you use it
entirely at your own risk, and I accept no liability for any damage, data loss or other harm
arising from its use. Back up your game files and saved games first.

Sid Meier's Civilization, its program, art, sound and data belong to their owners. This is a fan
project, not affiliated with or endorsed by Firaxis Games, 2K, Take-Two Interactive or MicroProse.
You need your own copy of the game.

Download

civ64.exe (below): one 64-bit program, no installer. SHA-256
dbf3ef9a6d4d1539f7c03eb48081f5b3eb9e684989c4cd6ef696b4211fabdd50, 5,004,800 bytes.

New since 1.0

Windowless play (both graphics). The window menu's Display > Windowless play shows the game,
during play, as one picture without captions, frames, borders or scroll bars, laid out like the DOS
game's screen: the menu bar across the top, the World Map and the Status panel in a column on the
left, and the map beside them. Menus open under their titles; dialogs, message boxes and the DOS
boxes float over the picture. Switch it on and off at any time, in a window or in full screen.
Command line: --windowless 0|1.

4:3 for the DOS gameplay. Display > 4:3 aspect ratio for 320 x 200 DOS gameplay (off by
default) gives the whole game with the DOS graphics the 4:3 shape of a DOS monitor: the menu bar and
its menus, the map, the World Map, the Status window, every DOS box and the full-screen DOS scenes.
The former "Correct 320 × 200 to 4:3" item is now 4:3 aspect ratio for 320 x 200 DOS intro
screens, with the same scope. Command line: --aspect gameplay or --aspect both.

CRT scanlines (both graphics). Display > CRT scanlines (off by default) adds a CRT monitor's
dark scanlines, modelled on DOSBox Pure Unleashed's CRT filter (scanlines only, normal gaps,
sharpest): one gap per DOS pixel row with the DOS graphics, per pixel row with the Windows graphics,
over the map zoom too. Every pixel stays as sharp as without it, and it does not slow the game down.
Command line: --crt 0|1.

Your own music and sound effects (both graphics). Put a MusicSfx folder or a MusicSfx.zip
next to civ64.exe with WAV files named like any of the Windows game's 24 sound files
(OPENING.WAV, CANNON.WAV, ... the full list is in the User Guide). Each file you supply is played
instead of the game's file of that name; the others stay the game's own. No music or sound files
are included: you supply your own. Without a source, the first start offers to choose one. The new
window-menu item Alternative music/soundfx turns them off and on. Command line:
--music-sfx <dir|zip|none>.

Fix: the DOS science advisor. With the DOS graphics, the science advisor's recommendation now
stands on the Status window, as in the DOS game, instead of in a second box; it follows the Status
window when it moves, when the map zooms and in windowless play.

All new choices are remembered between runs (windowless, aspect_play_4_3, crt_scanlines,
music_data, alt_sounds in civ64.cfg); options on the command line apply to that run only.

Everything from 1.0

The whole original game from the intro to the end games; the rules, computer players, map generator,
random numbers and screens recovered from the original machine code, bugs included; original save,
Hall of Fame, preference and replay formats; a resizable window and full screen with integer or fit
scaling; a game screen that fills the window; a three-level map zoom; light and dark title bars; and
the DOS graphics profile (Ctrl+Shift+Backspace) for the same running game. See the
v1.0 release.

Requirements

• Windows 10 (version 1607 or later) or Windows 11, 64-bit.
• Your own copy of Sid Meier's Civilization for Windows, all of its files. civ64 accepts exactly
  one release: civ.exe of 832,512 bytes, SHA-256
  a66ec64020f10adb81613964f3d08a11ea278b6a5a060c8e49d1ea1fd3ba1788.
• Optional, for the DOS graphics: your own copy of Civilization for DOS 475.01 (CIV.EXE of
  305,030 bytes).
• Optional, for other music and sound effects: your own WAV files.

How to start

1. Put civ64.exe in a folder of its own.
2. Next to it, put a CivWin folder with a copy of your Civilization for Windows files, or a ZIP of
   them named CivWin.zip. For the DOS graphics, add a CivDos folder or CivDos.zip. For your own
   sounds, add a MusicSfx folder or MusicSfx.zip.
3. Run civ64.exe. Without game files next to it, civ64 asks you to locate the game's civ.exe or
   ZIP and remembers your choice.

Upgrading from 1.0: replace civ64.exe; your settings and saves stay.

The User Guide explains every
menu, key and option.

Known limits

• The About box and the file's version resource still read 1.0; this release's program is
  identified by the SHA-256 above.
• The new features passed the project's automated build and test cycles (each unit's three-step
  cycle, and the closing run on 2026-10-19: AddressSanitizer, without-observer and Release suites
  green). The author's own visual checks passed for windowless play's first version; those of the
  other new features were still open at release time.
• The alternative sounds' first-start question is not exercised by the automated tests; the sound
  output itself was never measured.
• The new features change only what you see and hear, never the game: the same game, computer
  players and saves with or without them.
• Not reproduced (unchanged from 1.0): the original Help file (Windows 10 and 11 cannot show
  .hlp files), the speed of a 1992 PC, and same-seed replay in step with the original. The
  fidelity register lists every
  difference (F1 to F338).

What is not included, and why

• No game files, no music or sound files. None of the original games' files or bytes are in
  civ64.exe or in the repository. civ64 reads your own copy at run time and checks that it is the
  supported release.
• No source code in this release. The recovered C of the original program and the game core
  translated from it are readings of the copyrighted original, so they are not published. civ64's
  independently written code will be published in the repository later; on its own it does not
  build a playable game.

The full story of the work, its tests and measured data:
docs/README.md.

Sid Meier's Civilization 64bit 1.0

Sid Meier's Civilization 64bit 1.0: the 1992 Sid Meier's Civilization for Windows (the 16-bit
Windows 3.1 release), native on 64-bit Windows, with an on-the-fly switch to the graphics of
Civilization for DOS.

AI assistance and disclaimer of liability. This program was made with the assistance of
Anthropic's Claude AI, under my direction, and I tested it myself. It may contain errors that were
not found. It is provided "as is", without warranty of any kind, express or implied; you use it
entirely at your own risk, and I accept no liability for any damage, data loss or other harm
arising from its use. Back up your game files and saved games first.

Sid Meier's Civilization, its program, art, sound and data belong to their owners. This is a fan
project, not affiliated with or endorsed by Firaxis Games, 2K, Take-Two Interactive or MicroProse.
You need your own copy of the game.

Download

civ64.exe (below): one 64-bit program, no installer. SHA-256
adc8144193733d49437d54b6c9e23c7aeb17014bb08bda628c155582ae8e9864, 4,926,976 bytes.

Features

The whole original game. The intro, the title menu (Start a New Game, Load a Saved Game, Play on
EARTH, Customize World, View Hall of Fame, Quit) and the Birth of Civilization; the map, World Map
and Status windows, the city screens, every advisor and report, the Civilopedia, diplomacy, the
newspaper, the spaceship, the replay, the palace, the Hall of Fame and every end game; palette
cycling and fades; sound from the game's own .wav files. The rules, the computer players, the map
generator, the random numbers and the screens are the original's, recovered from its machine code,
bugs included. Saves, the Hall of Fame, preferences and replays use the original formats: your old
.SAV files load in civ64, and civ64's saves load in the original.

Window and scaling. A resizable, maximizable window and full screen (Alt+Enter); integer scaling
with sharp pixels or fit to the window with a nearest or sharp filter; the window's place and size
remembered; light and dark title bars and menus that follow Windows.

A map that fills your screen. Once a game begins, the game's screen takes the window's size, so
the map uses all of it, and it follows the window when you resize it.

Map zoom. Half size, normal or double size: Ctrl+Shift+Minus, Ctrl+Shift+0 (or Home) and
Ctrl+Shift+Plus, the mouse wheel over the map, or the window menu. At double size the view follows
your active unit; at half size the game's view is surrounded by the rest of the world, and a click
there centres the map.

The DOS graphics profile. Press Ctrl+Shift+Backspace at any moment, even in the middle of the
intro or a turn, and civ64 shows the same game with the art, palettes, fonts, menus and mouse pointer
of Civilization for DOS 475.01; press it again to go back. It covers the DOS intro, title box,
Birth, setup and Customize screens, Load and Save screens, and in play the map, small map, status
panel, menus and boxes, the city screen and city view, the reports, the palace, the Civilopedia,
discoveries, the newspaper, diplomacy, the spaceship and the end games. 320x200 screens are shown in
the 4:3 shape of a DOS monitor or with square pixels. Switching only changes what you see: the game,
the computer players and your saves are the same. This profile needs your own copy of the DOS
version; without it civ64 plays with the Windows graphics.

Requirements

• Windows 10 (version 1607 or later) or Windows 11, 64-bit.
• Your own copy of Sid Meier's Civilization for Windows, all of its files. civ64 accepts exactly
  one release: civ.exe of 832,512 bytes, SHA-256
  a66ec64020f10adb81613964f3d08a11ea278b6a5a060c8e49d1ea1fd3ba1788.
• Optional, for the DOS graphics: your own copy of Civilization for DOS 475.01 (CIV.EXE of
  305,030 bytes).

How to start

1. Put civ64.exe in a folder of its own.
2. Next to it, put a CivWin folder with a copy of your Civilization for Windows files, or a ZIP of
   them named CivWin.zip. For the DOS graphics, add a CivDos folder or CivDos.zip.
3. Run civ64.exe. Without game files next to it, civ64 asks you to locate the game's civ.exe or
   ZIP and remembers your choice.

The User Guide explains every
menu, key and option.

What is not included, and why

• No game files. None of the original games' files or bytes are in civ64.exe or in the
  repository. civ64 reads your own copy at run time and checks that it is the supported release.
• No source code in this release. The recovered C of the original program and the game core
  translated from it are readings of the copyrighted original, so they are not published. civ64's
  independently written code (the Windows 3.1 emulation, the run-time library replacement, the
  presentation, the tests) will be published in the repository later; on its own it does not build a
  playable game.
• Not reproduced: the original Help file (Windows 10 and 11 cannot show .hlp files), the speed
  of a 1992 PC, and same-seed replay in step with the original. The
  fidelity register lists every
  difference.

The full story of the work, its tests and measured data:
docs/README.md.