Half-Life: Doom

"'Ever wanted to play Doom in the GoldSrc mode? Ever had a desire to try out the game you know and love in a improved engine? Well, now you can!'""- Mod description"Half-Life: Doom is a concept for a Doom-themed Half-Life mod by Red-Verse-Writer. Inspired by several Half-Life-themed mods for Doom, in |this particular this mod, the mod inverts this concept by instead revolving around recreating the original Doom in the Half-Life game and its engine.

Gameplay
As a mod for Half-Life, the gameplay of Half-Life: Doom does not significantly differ from the base game. Players are required to navigate through levels, fight enemies, solve puzzles and monitor their supplies. Due to its dedication to the gameplay style of the original Doom, the mod features heavier emphasis upon combat over puzzles, although the latter is still utilized fairly regularly. Progress through the world is as continuous as to be expected, with scripted sequences in place of cutscenes and the player kept in complete control of the first-person narrative throughout most of the game.

The mod features all the weapons and monsters from Doom, Doom II and Doom 64, as well as a handful of new weapons and enemies. Other obstacles include pits of toxic waste, locked doors that require a keycard or flipped switch to open, enemy fortifications and gauntlets of hazards that the player must transverse. The player is able to perform a high jump by crouching for a period then jumping, combat roll in any direction, and pick up various objects for usage as brief melee weapons. While the player spends most of the game alone, they are occasionally accompanied by non-playable characters, mainly other marines with different abilities. Soldiers simply provide cover fire for the player with rocket launchers and assault rifles, Heavies use heavy machine guns to attack enemies and can use energy shields to protect allies, Medics carry a unlimited supply of medicine that they can use to heal the player and other NPCs while fighting with submachine guns, Engineers will cut open certain doors and repair certain objects for the player while using revolvers to defend themselves, and Scouts can detect hidden enemies and alert the player to a unobserved environment while wielding shotguns.

Returning

 * Fists: The starting melee weapon of the game, replacing the Crowbar from Half-Life. Due to its low damage and poor range, it should only be used as a last resort or when under the effects of the Berserk Power.
 * Chainsaw:
 * Pistol:
 * Shotgun:
 * Super Shotgun:
 * Chaingun:
 * Rocket Launcher:
 * Plasma Gun:
 * BFG 9000:
 * Unmaker:

New

 * Fire Axe:
 * Revolver:
 * Railgun:
 * Assault Rifle:
 * Sniper Rifle:
 * Flamethrower:
 * Grenade Launcher:
 * Lightning Cannon:
 * HE Grenades:
 * Napalm Grenades:
 * Kinetic Grenades:
 * Pipe Bombs:

Tools

 * Fire Extinguisher:
 * Sentry Turret:

Recovery Items and Ammo

 * Armour: Provides a certain amount of armour when collected. Unlike in the original Doom or Half-Life, all armour provides the same amount of protection (roughly 80%), and the normal limit is 999 rather than 100. The colour of the armour collected signifies the amount of armour gained.
 * Green: Provides the player with 50 armour.
 * Yellow: Provides the player with 100 armour.
 * Red: Provides the player with 200 armour.
 * Blue: Provides the player with 400 armour.
 * Black: Provides the player with 666 armour.
 * Pistol Bullets:

Power-Ups

 * Berserk Power:
 * Haste Power: