Doom · PC (MS-DOS) · 1993 · 4 players · Competitive
id Software's Doom (1993) introduced deathmatch — free-for-all competitive FPS play — and cooperative mode to the first-person shooter genre, creating the vocabulary for networked multiplayer gaming that every subsequent online game inherited.
Doom's multiplayer modes were designed by John Carmack and the id Software team as integral components of the game rather than afterthoughts. The shareware distribution model, which allowed the first episode to be distributed freely on floppy disks and bulletin board systems, meant that millions of players received the multiplayer-capable game without purchasing it. The game supported two to four players over local area network connections using the IPX protocol, and the two modes — cooperative, in which players fought through campaign levels together, and deathmatch, in which players attempted to kill each other for score — were fundamentally distinct experiences. Deathmatch was the genuinely new contribution. No prior game had presented four players competing to kill each other in a three-dimensional first-person environment with the spatial complexity, weapon variety, and movement speed that Doom's engine enabled. The term "deathmatch" was coined by id's Shawn Green and became the standard descriptor for competitive FPS multiplayer for a decade. The mode's design — shared maps, weapon spawns requiring physical possession, no respawn safety, kill-to-win scoring — established a template so successful that it persisted substantially unchanged through the following generation of shooters. The cooperative mode added a different dimension: campaign content designed for single players became shared territory. Players who had memorised map layouts could guide newcomers; coordination in combat became possible. The cooperative campaign was less transformative than deathmatch but equally influential — it demonstrated that a single-player campaign could serve as shared cooperative content without modification, a principle that shaped co-op FPS design through Halo and beyond.
Deathmatch's design solved several problems simultaneously. By placing weapon pickups on the map rather than assigning loadouts at spawn, it created a competition for resources that made map knowledge strategically valuable beyond mere navigation. A player who controlled the rocket launcher spawn point had a durable advantage; disrupting that control became a tactical priority for opponents. This resource-control dynamic, present in Doom deathmatch from 1993, remains the organisational principle of competitive multiplayer shooters.
The movement speed — significantly faster than any contemporary game — changed the spatial nature of competition. Players who mastered strafing, the technique of moving sideways while maintaining aim, had a decisive advantage over those who stood still to shoot. Movement became a combat skill rather than merely a traversal mechanic, and the emphasis on movement in competitive play that Doom introduced was amplified in Quake and persists in the mechanical DNA of every serious competitive FPS.
Doom's multiplayer required an IPX network — a protocol common in office environments — which meant that the game's early competitive community was often played at workplaces after hours, universities with campus networks, and LAN parties: gatherings at which participants transported computers to a shared space for multi-hour sessions. The LAN party as a social institution was created by Doom and sustained by its successors, and it produced the social norms — network configuration knowledge, carrying cases for tower computers, twelve-hour gaming sessions — that defined the pre-broadband competitive gaming community.
The internet adaptors that followed — DWANGO for Doom, and eventually the integrated internet matchmaking of Quake — were made possible by the community's existing investment in Doom multiplayer. id Software had built the audience before the infrastructure existed to serve it at scale.