How to download and run Doom

The central experience of the Doom community, of course, is playing the game. If you have never played before, this article should help you get started.

You will need a computer or game console capable of running Doom (a fairly complete list can be found here), as well as two pieces of software: Console versions of Doom always include both of these. If you have a Windows or Macintosh computer, and you buy a prepackaged game from id Software or your favorite retailer or online auction site, both pieces are also included. If you have a different operating system, or you just want a less buggy Windows program than Doom95, you may need a source port; these are generally free of charge, but include only the executable, and you must obtain the IWAD separately. (The Freedoom project intends to create a non-commercial IWAD, but it is far from complete.)
 * The program, or executable, which contains the game's engine and information about the monsters, weapons, powerups, and other objects. Different operating systems usually require different executables.
 * The IWAD, which contains all the actual levels and the graphics used to draw them. This is the same for every system.

For more detailed instructions, click on the kind of machine you are using.

More advanced topics
If you want to do more than just play the standard levels in single-player mode, your options are varied. You can try:
 * Playing multiplayer games.
 * Playing add-on levels (known as PWADs).
 * Recording and watching demos.
 * Speedrunning (competing against other players for the fastest demo on a given map).
 * Creating your own levels.
 * Helping to program, debug, or test a source port.
 * Otherwise interacting with the (still quite active) community of Doom fans; for instance, there are Doom web sites, IRC channels, and Usenet groups.