Halloween Harry
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Halloween Harry
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| Levels? |  Editable |
|---|---|
| Tiles? | Editable |
| Sprites? |  Not editable |
| Fullscreen? | Editable |
| Sound? | Not editable |
| Music? | Not editable |
| Text? | Not editable |
| Story/cutscenes? | Editable |
| UI/menus? | Not editable |
| Demos? | Unknown |
Halloween Harry (later renamed in Alien Carnage) is one of the last DOS platform games produced before the shift to first-person shooters.
Obtaining the game
The full version of this game has been released as freeware. One notable omission from the freeware release was the inclusion of STUDIO.EXE, a separate 'jukebox' program that could play all the music from the game.
- Archived version of the Alien Carnage download page at 3D Realms.
- Six different versions are available from Classic DOS Games
Tools
The following tools are able to work with this game.
| Name | Platform | Group/archives | Levels | Graphics | Music | Sounds | Text | Saves | .exe patch | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| ACXTRACT 4MD2MOD |
DOS | Read | No | No | Read | No | No | No | No | |
| Camoto | Linux/Windows | Edit | Edit | Edit | No | No | No | No | No | |
| Camoto/gamearchive.js | Any | Edit | No | No | No | No | No | No | No | |
| Wombat | Windows GUI | Read | No | Read | No | Read | No | No | No |
File formats
The following file formats are used by this game.
| Filename | Format | Details |
|---|---|---|
| *.4md | 4MD Format | Background music |
| *.4bt | 8-bit unsigned PCM audio ! unknown sample rate, maybe 4.7kHz? | Digitised sound effects |
| *.bbk | ICO Format (Halloween Harry) | Graphics and fonts |
| *.bnk *.fat harry.-0 |
BNK Format (Halloween Harry) | Archive storing most of the game data |
| *.cfg | Halloween Harry Configuration Format | Game settings |
| *.chr | CHR Format (Halloween Harry) | Graphics |
| *.dlg | Halloween Harry Dialogue Format | Cutscene dialogue text |
| *.gmf | GMF Format (Halloween Harry) | Game levels and palette data |
| *.hsb | HSB Format (Halloween Harry) | Sprite graphics |
| *.ico | ICO Format (Halloween Harry) | Graphics |
| *.ins | INS Format (Halloween Harry) | Text for ordering information screens |
| *.jft | ICO Format (Halloween Harry) | Fonts |
| *.pcc | PCX Format | Small images |
| *.pcx | PCX Format | 320×200 full-screen images |
| *.rob | ? | Seems to be some sort of archive with at least one PCX file in it. Used for animation sequences in the dialogue cutscenes. |
| *.top | TOP Format (Halloween Harry) | High scores |
| *.dt | ? | ? |
| harry*.-0 | EXE Format | Except for harry.-0, game .exe files |
| slot.* | Halloween Harry Saved Game Format | Saved games |
Notes
- The game won't read files from the current directory before falling back to harry.-0, and won't run without harry.-0 present. Therefore modified files must be inserted into harry.-0 before the game will see them.
- There are two files left over from game development inside order.bnk. These two files are called build.bat and make.bat, both of which are DOS batch files to create the order.bnk file itself. From this it can be seen that there are two programs used during development, one called kit which creates the .bnk files, and one called dizfile which may create the corresponding .fat file from the .bnk.
- The beta version contains a bug in M3Z3 (sewer level 3) where the player spawns inside a wall and thus cannot move, preventing the game from being played beyond this point. This can be fixed by patching harry.-0 at offset 0x318C02, changing 4D 00 28 00 to 4C 00 2D 00. This moves the player's start position to the same location as it is in the retail game.
- As the game was written in Turbo Pascal, a Runtime Error 200 will appear when run on a fast computer. This can be fixed with the TPPATCH utility, however all EXE files must be patched, which means all the files with a .-0 extension, except for harry.-0 which is not an EXE. The freeware release already includes patched versions of all these files.