Shared video game continuities have existed since before the Marvel Cinematic Universe linked dozens of movies and TV shows that all have intertwining plots occurring in the same universe at roughly the same time. Movies and TV shows aren't the only ones with shared universes though, several video games and gaming franchises inhabit the same universes, often in subtle ways.
Sometimes it's obvious when games take place in the same universe, but other times, it the connections are small details that could easily be missed. Now, we're not talking about crossovers here. Crossovers are something else entirely and involve characters from one franchise appearing in another. This list is concerned with games that seem like separate entities when they are actually happening together in one universe.
Some of these games exist in the same universes at roughly the same time. Many occur at different times in the same universe, though, sometimes hundreds or even thousands of years apart.Not every shared video game universe fan theory is watertight; some have their holes and some are built on sand, but they all have at least some basis in facst. For many fans and gamers, just the idea of seemingly disconnected video games sharing settings adds to their enjoyment. So join in their excitement and check out this list of video games that could actually exist in the same universe.
Counter-Strike and Left 4 Dead
Fans of this theory say that the events of Counter-Strike precede Left 4 Dead. They argue that at some point in the Counter-Strike narrative, the terrorists win and release a zombifying chemical weapon. The main connecting point between these two franchises is the similarities between some of the maps and destinations in each. The resemblances are uncanny enough to convince many that they fall at different spots on the same timeline.
Assassin's Creed, Far Cry, Watch Dogs, and Ghost Recon
This one is all about the Ubisoft titles. A lot of this theory revolves around the Abstergo brand that appears in three of these four games. This, along with strikingly similar technologies and names popping up across the different franchises has lead many to believe that they all reside in the same universe. In the case of Assassin's Creed and Watch Dogs, Ubisoft has confirmed that they do, in fact, exist in a shared continuity.
Halo, The Thing (Movie), and Dead Space
This theory more or less revolves around the bad guys in these two games and the shapeshifting alien host in John Carpenter's 1983 horror classic. Their similar appearances and method of infecting hosts is the framework here, with several other small details lending a bit more credibility. If this sounds far-fetched, just remember that if it's true, then Halo, The Thing, and Dead Space still exist in vastly different time periods.
Super Mario Bros and Banjo-Kazooie
The evidence that these two Nintendo classics exist in the same universe relies heavily on the fact that Mario and Donkey Kong exist in the same universe. Since Banjo is featured in Diddy Kong Racing down the line, it makes sense that Banjo and Kazooie are part of Mario's world. And there are references to Banjo's racing days in Banjo-Kazooie, cementing that his days with Diddy Kong are canon.