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Heretic

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Title Screen

Heretic

Also known as: Heretic: Shadow of the Serpent Riders
Developer: Raven Software
Publisher: id Software
Platform: DOS
Released internationally: December 23, 1994


DebugIcon.png This game has debugging material.
Carts.png This game has revisional differences.


ProtoIcon.png This game has a prototype article

Heretic is Doom, fantasy style.

Debug Features

Frame Rate Ticker

Heretic-Ticker.png

The frame rate ticker from Doom is still available, but instead of being activated with a launch parameter, it can be activated at any time during gameplay with the TICKER cheat code. It prints a line of 20 white or black pixels in the upper left corner - divide 35 by the number of white pixels to determine the current frame rate.

Sound Debug Info

Heretic-SoundDebug.png

The NOISE cheat code activates a sound debug info text overlay, which shows the file name, ID, distance, and other info for the sound being played in each channel.

Screenshot Key

Launch the game with the -ravpic parameter to enable taking PCX screenshots with the F1 key, instead of it cycling through the ordering, controls, and credits screens.

Revisional Differences

v1.0

This was the first release of the game.

Heretic-F SKY1.png

v1.0 shareware actually has an image of SKY1 on the F_SKY1 flat used to open sectors to the sky. All future versions, including v1.0 registered, replace it with a four byte file. This has no noticeable impact in game, since the flat can only be seen in editors.

v1.2

This was the first update, as v1.1 was never released officially. It fixed a "green screen" startup crash, a problem with restoring save games from SETUP.EXE, and "few sniggling little bugs too esoteric to mention".

v1.0 v1.2
Heretic-WALL56v10.png Heretic-WALL56v12.png

The WALL56 patch used by the SAINT1 texture was made more detailed in this version.

Firemace Spawn Behavior

The Firemace weapon is unique in that it only has a 75% chance of appearing in a level, and only one Firemace can appear at a time even if multiple spawns for it are present.

In v1.0, any extra spawns would be replaced with different enemies depending on the episode: Disciples of D'Sparil in City of the Damned, Weredragons in Hell's Maw, and Ophidians in The Dome of D'Sparil. Additionally, due to a bug, Shadowsphere artifacts replaced them in the secret E4M1 deathmatch level if it is loaded in single player. Note that the Firemace never officially appears in City of the Damned, so the Disciple replacements could only been seen in custom levels. That is no longer the case in this version.

(Firemace enemy substitution info: Doom Wiki)

Shadow of the Serpent Riders

Much like The Ultimate Doom, when this game saw a retail release two additional nine level episodes were added: The Ossuary and The Stagnant Demesne. Two more hidden deathmatch levels have been added in the E6M1 and E6M2 slots, and the one that was originally in E4M1 was moved to E6M3 due to the inclusion of a real fourth episode. On the startup screen, this is called v1.3.

Original Shadow of the Serpent Riders
Heretic-OldTitle.png Heretic-title.png

The title screen was updated to use the same Tome of Power featured on the box art surrounded by flames, instead of the original artwork of Corvus fighting Undead Warriors.

Original Shadow of the Serpent Riders
Heretic-CREDIT.png Heretic-CREDITsotsr.png

Eric C. Biessman and Tim Moore were added to the level design credits. The rest of the text was shifted slightly to make room for them and the drop shadows were removed. The background was also touched up, though somehow a few areas became slightly corrupted (mostly behind Shane Gurno and Brian Raffel's names).

Other Unused Content

Heretic E1M9 unclosed sector.png
  • In E1M9, at the south-west room, there are a few linedefs on the outside of the map structure. While they give a good look when viewed on an overhead map, they can only be seen through the no clipping cheat.
  • In E2M2, six wall torches found at (1936, 1392), (1840, 1584), (1936, 1584), (1840, 1776), (1936, 1776), (1840, 1392) are outside the map. These were meant to be inside the chain of three secret rooms.
  • In E3M1, linedef 295 has an upper texture defined on the back. This is the wrong side, which causes a minor distortion to be visible on the ceiling. Similar linedefs with textures on the wrong side are also located in E3M2, E3M7, E4M6 (which requires noclip to even notice it's missing).
  • In E3M2, linedefs 521-528 have the upper texture on the wrong side. This also results in visual distortion, but it's slightly harder to see due to the extreme angle required.
  • In E3M4, there's an unreachable section behind the player, implied to be a staircase from the previous area. Using a no-clip cheat to enter it will show it terminates in an untextured wall (producing a hall-of-mirrors effect). There is a further incomplete and unclosed sector, with two walls, and using a ceiling and floor of FLAT503 (in contrast to the stairs which use FLAT521).
  • In E3M6, there's a Quartz Flask placed outside the map at (-448, 1088). It's located south of the eastern yellow key door.
  • E4M9 contains a single linedef sector. It's found with a few other unclosed sectors in the same area, all three of which could be merged into one.