Play Doom 3 Online Free

About Doom 3

Doom 3 is id Software's 2004 reinvention of the series as survival horror. The Union Aerospace facility on Mars has opened something it shouldn't have; you are a marine with a torch, a pistol and a growing sense that the corridors are darker than they need to be. The famous design decision — you couldn't hold the torch and a weapon at once in the original release — defined the whole experience.

This page runs a WebAssembly port of the demo, using id Tech 4. It's a genuinely impressive thing to have running in a browser tab: real-time shadows, bump-mapped monsters and all.

How to play Doom 3

Move

W A S D

Look

Mouse (click the game to capture the cursor)

Fire

Left click

Torch

F

Weapons

Number keys or scroll

Use / interact

E

Sprint

Shift

1. Work through the Mars facility, using the PDA to pick up codes and audio logs.
2. Switch between torch and weapon as the corridors demand.
3. Enemies spawn from closets and behind you — expect ambushes at pickups.
4. Find health and armour stations on the walls between fights.

Doom 3 tips

• Back into a corner before a fight so nothing can spawn behind you.
• The shotgun is devastating at point blank and near-useless at range — close the distance or switch.
• Listen for the spawn sound; it plays a beat before an enemy appears.
• Read the PDAs. Door codes are in them, and skipping them means backtracking.

Doom 3 — questions