Chainsaw

From DoomWiki.org

This article is about the weapon in the classic Doom series. For other versions of this weapon, see:
A chainsaw in a suspiciously empty passage on MAP08: Tricks and Traps.
The chainsaw, near where it is found in E1M2: Nuclear Plant.

The chainsaw mutilates enemies close enough to contact. At 525 hits per minute, it is roughly a quadruple-speed fist. Its "rapid fire" works well on enemies with high pain chance, minimizing damage to the player in melee situations. It is often used to conserve ammo or simply because of its gory implications. When picked up, the message is "A Chainsaw! Find some meat!".

It is most effective against demons and spectres, since the player can usually kill them without taking damage. The chainsaw's disadvantage is its slow killing speed compared to the berserk fist, which becomes a liability when facing multiple enemies in open areas. Expert players confronted by a pack of demons and spectres back into a corner and chainsaw them down one by one; if the corner is less than 107 degrees wide, only one demon can attack at a time.

The chainsaw has a range of 33 units, slightly larger than the fist's 32 units.

It can also be used fairly effectively against cacodemons, pain elementals, lost souls, and imps. A safe application against revenants requires a difficult method of continuously backing off, maintaining a distance too far for its fists and too close for its rockets. It is ineffective against Hell knights and other demons with powerful attacks and low pain chance. A safe and easy usage against zombies is possible when waiting behind a sharp corner, but two things must be considered. First, zombies often advance in a zig-zag pattern. Second, using the chainsaw behind doors may cost more ammo than it saves if the dropped weapon or ammo is not picked up and smashed in the closing door. When used against mancubi, the monster may suddenly start to retaliate; this risk may somewhat be lowered by using several short attacks.

The chainsaw is effectively rendered useless against demons and imps if the game is played with the -fast parameter (such as in Nightmare! difficulty), since these monsters' melee attacks are three times as fast.

The chainsaw first appears in a secret area of the level E1M2: Nuclear Plant, and appears again in secret areas of E1M3: Toxin Refinery and E1M5: Phobos Lab. It is finally found in a non-secret area on E2M6: Halls of the Damned.

In vanilla Doom, if a player has a chainsaw, they cannot switch back to the fists unless they have a berserk pack. Most modern source ports allow toggling of the fists and chainsaw by pressing "1" (as with the two shotguns in Doom II).

The chainsaw can be obtained via the cheat codes idchoppers, idfa or idkfa.

Notes[edit]

  • Total number and timing of the chainsaw's animation frames are identical to those of the chaingun; as a result, they have the same rate of fire. The chainsaw however deals slightly higher damage per second, as the mean damage of a single tooth is higher that a bullet's.
  • Switching to the chainsaw means that there is a continuous buzzing from the chainsaw motor. When "fired", the chainsaw is shoved forward and the buzzing changes to a higher and even more intense whine. Like gunfire or a fist punch, attacking with the chainsaw will alert monsters in open areas, however merely switching to the chainsaw will not. Players who often want to provoke enemies into finding them can "fire" the chainsaw, without wasting ammo.
  • The chainsaw graphics are based on scans of a real chainsaw, a McCulloch Eager Beaver (borrowed by Tom Hall from his girlfriend).
  • The TV advertisement for the Super Nintendo port showed numerous instances of the player chainsawing imps and demons, intercut with images of butchers at a slaughterhouse/meat factory.
  • The chainsaw appears to have no discernible reason to be on Phobos as the moon appears to be devoid of plant life. This is parodied in Doom 3 by having a chainsaw shipment being a mistake.
  • Due to a limitation of the game engine, the chainsaw does not penetrate its victims; instead, it repeatedly re-aligns the player's position to give the effect of being 'locked' with the target. This can be observed by simultaneously sawing a demon and attempting to turn with the mouse.
  • If the menu is accessed or the game is paused while the player attacks with the chainsaw, the weapon will buzz in a strange, high pitch for a moment.
  • The chainsaw "rev up" sound (DSSAWUP) is played when the player switches weapons to the chainsaw. Normally it is not played in its entirety, as the sound is cut off by the normal sound effect made by the chainsaw while selected (DSSAWIDL). It can be heard in its entirety by switching weapons to the chainsaw from any other weapon, and immediately pausing the game; and is also played completely when a new level starts with the active weapon being a chainsaw (see Intermission screen#Chainsaw sound effect).
Doom 64's chainsaw
  • Doom 64's chainsaw is drastically different in terms of appearance. The saw has two blades instead of one and the letters "U.A.C." are engraved on top of the weapon. The damage inflicted by this version of the weapon is also doubled.
  • The idchoppers cheat code which gives the chainsaw is also supposed to make the player invulnerable; however because of a confusion between a countdown timer and a boolean value, this invulnerability only lasts a single tic. From st_stuff.c:
     // 'choppers' invulnerability & chainsaw
     else if (cht_CheckCheat(&cheat_choppers, ev->data1))
     {
       plyr->weaponowned[wp_chainsaw] = true;
       plyr->powers[pw_invulnerability] = true; // this value is supposed to be how long the power lasts
       plyr->message = STSTR_CHOPPERS;
     }

Data[edit]

Chainsaw data
Weapon number 1
Damage 2-20
Included ammo Infinite
Shot type Hitscan
Shots per minute 525.0 teeth
Sound DSSAWUP (when selected)
DSSAWIDL (idling)
DSSAWFUL (firing)
DSSAWHIT (doing damage)
Appears in Shareware Doom
Registered Doom
The Ultimate Doom
Doom II/Final Doom
Thing type 2005 (decimal), 7D5 (hex)
Radius 20
Height 16
Sprite CSAW (before pickup)
SAWG (wielded)
PUFF (impact, miss)
BLUD (impact, hit)
Class Weapon
Pickup

The chainsaw can inflict approximately 94.47 points of damage per second:

Seconds needed to kill1 Mean Standard
deviation
Min Max
Barrel 0.27 0.09 0.11 0.57
Trooper 0.27 0.09 0.11 0.57
Sergeant 0.38 0.11 0.23 0.80
Wolfenstein SS 0.60 0.14 0.34 1.03
Imp 0.70 0.14 0.46 1.14
Chaingunner 0.80 0.15 0.46 1.26
Lost soul 1.12 0.18 0.80 1.60
Commander Keen 1.12 0.18 0.80 1.60
Demon 1.65 0.21 1.14 2.17
Spectre 1.65 0.21 1.14 2.17
Boss brain2 2.70 0.24 2.06 3.20
Revenant 3.23 0.25 2.51 3.66
Cacodemon 4.29 0.29 3.43 5.03
Pain elemental 4.29 0.29 3.43 5.03
Hell knight 5.33 0.27 4.57 5.94
Arachnotron3 5.33 0.27 4.57 5.94
Mancubus3 6.39 0.25 5.83 6.97
Arch-vile 7.46 0.23 6.86 8.00
Baron of Hell 10.64 0.23 10.06 11.20
Spider mastermind3 31.80 0.23 31.20 32.34
Cyberdemon3 42.38 0.28 41.71 43.20

  1. This table assumes that all calls to P_Random for damage, pain chance, and blood splats are consecutive. In real play, this is never the case: counterattacks and AI pathfinding must be handled, and of course the map may contain additional moving monsters and other randomized phenomena (such as flickering lights). Any resulting errors are probably toward the single-shot average, as they introduce noise into the correlation between the indices of "consecutive" calls.
  2. Assumes that direct hits are possible, which does not occur in any stock map.
  3. Due to errors in the line-of-sight algorithms of vanilla Doom (see Spider paralysis), it is sometimes impossible to keep the chainsaw in continuous contact with a wide monster.

Appearance statistics[edit]

The IWADs contain the following numbers of chainsaws:

Game ITYTD and HNTR HMP UV and NM
Ultimate Doom 16 16 16
Doom II 7 8 8
TNT: Evilution 20 19 19
Plutonia 4 4 4

See also[edit]

External links[edit]

Weapons from Doom and Doom II
Fist Pistol Shotgun Chaingun Rocket launcher Plasma gun BFG9000
Chainsaw Super shotgun