Doomed is a multiplayer online computer game. It appears to be a first- or third-person shooter game divided into multiple levels. Danny and Tucker often stay up late playing this game together. Sam is one of the highest-ranked Doomed players, which greatly surprised Danny and Tucker when they found out.
In "Teacher of the Year," Technus goes into the game to try to gain access to the world wide web. Danny has to enter the game himself via the Fenton Helmet to defeat Technus. In "Identity Crisis," Danny has to save his ghost-catching files on his computer but his hard drive is full, so he deletes his old copy of Doomed. This releases Technus from the game and back into the world. In "Secret Weapons," the Doomed icon appears on Vlad's desktop, suggesting that he plays the game himself.
These are the players of Doomed and their usernames (if known) shown in the series:
- 112. "Teacher of the Year"
- The name of this game is a reference to the video game series DOOM.
- The Level Zero glitch is a reference to the Mario glitch known as the Minus World glitch. Both glitch levels are inescapable.
- Tucker's username "Fryertuck" almost certainly alludes to Friar Tuck, the companion of Robin Hood.