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Descent (PC)

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Title Screen

Descent

Developer: Parallax Software
Publishers: Interplay (DOS), MacPlay (Mac OS Classic)
Platforms: DOS, Mac OS Classic
Released in US: February 28, 1995 (DOS), November 1995 (Mac OS Classic)
Released in EU: 1995


EnemyIcon.png This game has unused enemies.
GraphicsIcon.png This game has unused graphics.
SoundIcon.png This game has unused sounds.
TextIcon.png This game has unused text.


The game that tried its hardest to be better than Doom and to kickstart the six degrees of freedom FPS genre, with at best modest success.

Unused Graphics

Descent-gauge02.png

The Afterburner from Descent 2 was originally planned to be in Descent 1, but didn't make the cut. A single unused gauge graphic remains from it, which doesn't fit the Descent 2 cockpit.

Descent-animblob01.gif

An unused blue version of the Class 1 Drone blob.

Descent-blob01.png

Another unused blob. Internally defined as the Vulcan Cannon projectile's sprite, but is not rendered in game.

Descent-wall01.gif

Several frames exist for what looks like a breakable wall version of the default light gray rock texture, called rock001 (as seen in the first level). It is defined to be breakable like a hostage door, and it explodes when fully destroyed. Could possibly be an early way of hiding secrets, before the secret doors were added.

Descent-misc010.png

An unused monitor texture that appears to be telling the player to beat it.

Descent-misc030.png

A variant of the used sign to mark energy centers, but with a wrench instead of a lightning bolt. Potentially used for the scrapped repair centers. A used door texture uses this sign.

Descent-misc035.png
Descent-misc039.png

A pair of damaged signs that go unused.

Descent-misc019.png

A gray version of the energy center grid texture.

Descent-misc09.gif

An animation of what appears to be slime or acid. When used in a level, it can be safely touched without causing damage unlike the used lava.

Descent-lava02.gif

An alternate palette-cycling lava texture, unused in the first game, but would later become used in Descent 2.

Descent-misc049.gif

What appears to be a quarter of a landing pad graphic.

A small number of rock and metal graphics go unused.

Unused Enemy & Enemy Behavior

Descent-splitpod.png
The Split Pod (also sometimes called the red triangle) has a very basic model, consisting of a single tetrahedron that has a single solid glowing red texture. If placed into a level, it mainly floats around, occasionally charging into, circling around and chasing players, and is worth 100 points when killed. Crashing into them only yields the standard contact damage, so they're mostly harmless. They won't drop anything except if specified to and only have a single sound effect that is shared with Medium Lifters. Some custom levels use them as mine-laying robots (similar to Gophers), and in this mode they move around fast. Based on the model, behavior and its lack of sound effects, it could be an early testing enemy. Strangely enough, their primary weapon has been set to blue lasers, but they are never fired.

Descent-robot30.png
Possibly related to the unused Split Pod robot, included in Descent v1.0 is a unused model of a green ball with glowing red patches. Only the model remains, no stats or AI data are included for the robot.

Descent-bot11.png
An early robot model present in the Descent source code. Can be seen briefly in this early footage.

Descent-bot17.png
Another early robot model present in the source code, however, its textures are missing. A checkerboard texture is used to visualize how the texture would be applied.

Descent-robot b2.png
A large robot model with four guns from the source code, also briefly visible in the early footage, along with the unused "slime" texture.

Descent-robot s2.png
An early version of the Class 1 Drone model, also with missing textures. A number of them are visible in this early clip.

The used enemy Class 3 Gophers are only used as mine-laying robots in the game, but that isn't the only AI mode they have! If set to use default AI, they will chase the player slowly and fire blue lasers at them. Some custom levels use this behavior.

In addition to the used cloaking mode where a robot is always cloaked, there is an alternate mode where the robot is only cloaked when it is not attacking, that goes unused by all the game's robots.

Unused Weapons

All projectiles are defined in a table, and a few entries go unused.

Projectile #5 is a blue energy ball, moving at the same speed as the Class 1 Drone's projectile, and does 2 damage on Trainee up to 6 on Insane.

Projectile #8 is completely uninitialized, with all of the fields unset and at default values. Stats are defined for this weapon in version 1.0, but aren't loaded, and the referenced sprite isn't included. It also moves at the same speed as the Class 1 Drone's projectile, and does 8 damage on Trainee up to 18 on Insane.

Projectile #13 is the original Spreadfire projectile. Compared to the normally used Spreadfire, this version travels slower, at 130 units/second vs. the normal's 200 units/second, and does less damage at 9 per projectile vs. 10 per projectile.

Projectile #24 is another version of the Spreadfire. The source mentions this one was intended to be used for the projectiles that spread out, and it is defined to make no sound. The game ultimately implements this in a different way, so the projectile isn't needed. It does 12 damage vs. the normal Spreadfire's 10 damage.

Unused Powerups

None of the sprites referenced for these powerups exist, and even if they are modified to have sprites, they can't be picked up due to their pickup routines being commented out in the source. However, some have some lingering code that still functions.

$POWERUP_UNUSED name="R_Pill" vclip_num=27 hit_sound=83
$POWERUP_UNUSED name="P_Pill" vclip_num=28 hit_sound=83

The source code describes these as powerups for a scrapped radar feature, where the first one would cause it to show robots, and the second would cause it to show powerups. Neither of these function, since the radar was scrapped. There is also a flag defined that would show robots on maps, but no powerup was ever made to grant it and it doesn't work at all.

$POWERUP_UNUSED name="M_Pill" vclip_num=29 hit_sound=83
Descent-fullmap.png

This powerup would reveal the full map, the same as the map powerup that made its way into Descent 2. The reveal map effect is fully functional, and can be demonstrated by adding 64 to the 32 bit integer at #13D9 in a Descent v1.5 savegame. Like the Descent 2 version, unvisited areas are shown in blue.

$POWERUP_UNUSED name="Turbo" vclip_num=48 hit_sound=83

This powerup was the afterburner. The afterburner was fully implemented, but scrapped at some point before release, with most of its code still present but commented out. The actual extra thrust effect was never commented, however, and can be enabled by adding 4096 to the 32 bit integer at #13D9 in a Descent v1.5 savegame. This will cause the player to always move forward at full speed, as if the cruise was set to max, but in addition, the player can also use the normal flight controls to add to this forward thrust, allowing for doubled forward speed. The source shows that unlike the Descent 2 version, this version was toggled by a key press, rather than requiring the key to be held down, and would store enough energy for five seconds of thrust.

$POWERUP_UNUSED name="Headli" vclip_num=50 hit_sound=83

This powerup would be a headlight. No code for this powerup exists, but the player does always cast a faint light, identified as the "headlight" in the source code.

$POWERUP_UNUSED name="Megwow" vclip_num=52 hit_sound=83

This powerup would give the player all weapons, full shields and energy, and a stock of missiles. Curiously, while all the other powerup pickup routines have been removed, this powerup's routine remains, but it is only enabled in debug builds. It is set to give 50 concussion missiles, 50 homing missiles, 50 proximity bombs, 10 smart missiles, and 10 mega missiles.

Unused Text

Hmmm...
To do:
Rest of the .txb files within DESCENT.HOG may have something extra.
$S41
$T 30
$C1
PTMC -- TEST SCREEN 35
$S42
$T 30
$C1
PTMC -- TEST SCREEN 36
$S43
$T 30
$C1
PTMC -- TEST SCREEN 37

Located at the end of BRIEFING.TXB, likely placeholders.

@$HOSTAGE_FACE face01.abm clip_num=0 time=2.1 abm_flag=1 sound_num=-1
@$HOSTAGE_FACE face02.abm clip_num=1 time=2.1 abm_flag=1 sound_num=-1

Included in version 1.0's BITMAPS.BIN file are some definitions for hostage faces that aren't used. These definitions are removed in all later releases of the game.

alone in a dark wood.
Midway in our life's journey, I went astray
from the straight road and woke to find myself 000000000000
Descent-registration.png

Marker text present in the executable. These are used to mark locations to stamp the executable to create a time limited evaluation copy for specific users. The text itself isn't important to the feature, and is taken from the Divine Comedy. The first string marks the location the name checksum is stored, the second string marks where the name is placed, and the third string marks when the copy expires and can't be played.

Unused Sounds

A second robot tearing sound based on its filename. The game only uses tear01.wav for all of the melee bots.

Unused sounds for enemy robots that are based on the ominous sound emitted by missile-firing Hulks. The first three are shorter versions of the used sounds, but the last two are drastically different.

Unused sounds for the boss robots.