Engineered by John Carmack, John Romero, and id Software in December 1993, DOOM transformed personal computing and defined the first-person shooter genre. Its blistering speed, labyrinthine sci-fi corridors, heavy metal soundtrack by Bobby Prince, and visceral shotgun combat created an international gaming sensation.
On GameHood UK, you can jump straight into the demonic invasion on the moons of Mars via modern WebAssembly compilation—featuring instant load times, crystal-clear 1080p canvas scaling, and zero downloads.
1. Complete DOOM PC Cheat Code Directory
Type these iconic cheat sequences directly on your keyboard during live gameplay:
| Cheat Code | Official Name | In-Game Effect |
|---|---|---|
IDDQD |
Degreelessness Mode | Invulnerability (God Mode); Doomguy's eyes glow gold |
IDKFA |
Happy Ammo & Keys | Grants 200% Armor, all 6 Weapons, maximum Ammo, and all Color Keycards |
IDFA |
Firearms Only | Grants all weapons and ammo without giving puzzle keycards |
IDCLIP |
No-Clip Mode | Walk through solid walls, closed doors, and out-of-bounds terrain |
IDBEHOLDS |
Berserk Pack | Supercharges fists to one-shot punch Imps and Pinky Demons |
IDCLEV## |
Level Warp | Warp to any stage (e.g., IDCLEV18 warps directly to E1M8) |
2. Arsenal Tier List & Demonic Damage Output
| Weapon | Ammo Type | Optimal Combat Range | Tactical Recommendation |
|---|---|---|---|
| Super Shotgun / Shotgun | Shells | Close to Mid-range | The backbone of DOOM combat. High spread guarantees instant kills on Former Humans and Imps. |
| Chaingun | Bullets | Mid to Long-range | Rapid fire locks tough enemies like Cacodemons in constant pain-state stagger loops. |
| Rocket Launcher | Rockets | Long-range only | Extreme area-of-effect splash damage. Beware of splash recoil in cramped hallways! |
| Plasma Rifle | Energy Cells | Rapid Mid-range | Melts heavy Baron of Hell hitpoint pools in seconds with high rate of fire. |
| BFG 9000 | 40 Cells | Room-clearing | Emits an invisible 45-degree forward damage cone upon impact, wiping entire monster hordes. |
3. Episode 1: Knee-Deep in the Dead Walkthrough Secrets
Episode 1 remains a masterclass in nonlinear level design:
- E1M1 (Hangar): Do not exit immediately! Lower the toxic waste walkway elevator to access the outdoor green armor courtyard.
- E1M2 (Nuclear Plant): Shoot the glowing vent to uncover the hidden Chainsaw behind the dark computer terminal room.
- E1M3 (Toxin Refinery): Hit the blue skull switch, cross the toxic sludge pool, and step through the hidden doorway to discover the secret exit to E1M9 (Military Base).
- E1M8 (Phobos Anomaly): Step onto the pentagram platform to battle the twin Barons of Hell. Use pillars for cover, strafe in wide counter-clockwise circles, and rocket them until the star chamber lowers.
4. Pro Combat Movement: Circle-Strafing & Monster Infighting
Surviving Nightmare difficulty requires mastering two critical mechanics:
- Monster Infighting: Demons will attack each other if hit by friendly fire. Lure an Imp fireball into a Cacodemon or a Baron of Hell to make them battle each other while you conserve ammunition.
- Circle-Strafing: By combining sideways movement (A or D) with rotational camera adjustments, you move faster diagonally than running straight forward, dodging incoming projectile fire effortlessly.
Frequently Asked Questions
How do you enter cheat codes in DOOM 1993 in the browser?
Simply type the letters directly on your keyboard during active gameplay without pausing. For example, typing 'IDDQD' instantly enables God Mode (Degreelessness Mode), while 'IDKFA' grants full ammo, all keys, and weapons.
What does the BFG 9000 do and how does its invisible cone damage work?
The BFG 9000 fires a green plasma sphere. Beyond the main blast, the game calculates an invisible 45-degree forward cone from the player's perspective when the projectile impacts, causing devastating secondary raycast damage to every demon in your view.
Can you play DOOM in modern web browsers with WASD and mouselook?
Yes! On GameHood, the DOOM web port includes modern WASD strafing, Space to open doors/switches, and smooth 60 FPS rendering with zero frame stutter.
How do you reach the secret level E1M9 (Military Base) in Episode 1?
In E1M3 (Toxin Refinery), locate the blue key, then follow the secret slime path around the courtyard to find the alternate red exit switch that warps you directly to E1M9.