A strange little side quest
The next time Drag Shooting asks for one more try, remember that game ideas rarely appear from nowhere. Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. The same trail leads to another fact: Space Invaders, released in 1978, helped push video games into mainstream popular culture. It is a good reminder that simple game mechanics can carry a surprising amount of history.