Intrusion

A strange little side quest

A quick detour while Intrusion waits for your next move: Doom changed game design and distribution in 1993 by separating its engine from content and spreading widely through shareware. Another piece of context lands nicely beside it: Spacewar! appeared on MIT's PDP-1 in 1962 and became one of the earliest influential computer games shared among programmers. That history is one reason familiar mechanics can still feel new when they are recombined well.