DOOM 1, the classic first-person shooter video game, was released in December 1993 and is a beloved classic for many gamers. The original single-player version of the game can be completed in about 8-10 hours, depending on the player's skill level. There are nine levels in the game, all of which can be completed in a single playthrough. For players who want to find all the secrets and explore every corner of the game, the average playtime can be extended to around 12-15 hours.
The game also has an additional four levels in the expansion pack, The Ultimate DOOM, which can be completed in about 4-5 hours. Together, the original game and the expansion offer players a total of 13 levels and can take up to 18-20 hours to complete.
In addition, DOOM 1 also features a multiplayer mode, allowing up to four players to play on the same computer. The amount of time it takes to complete the game in multiplayer mode depends on the number of players, the difficulty level, and the strategies they use. A typical deathmatch game can last anywhere from 15 minutes to an hour.