- Although there are many similarly-themed RPs, Milliways Bar deserves mention just for its size. The basic premise is that any character from any fandom can find themselves at the titular bar... and sometimes it seems like just about everyone has.
- The Game in which Life In A Game takes place seems to take all video games as true, with Zelda appearing alongside Master Chief, and Frog serving as the hero's Jerkass Mentor.
- That Guy with the Glasses
Ask That Guy: (speaking to the various reviewers present) In fact, I think there's a lot of you who want to do crossovers, aren't there? Because everybody really eats that shit up.
- The one year anniversary video. Basically, in a Chicago hotel 20 contributors of Video Review Shows beat up one another in an Ultimate Showdown of Ultimate Destiny, climaxing in Super Mega Death Christ vs. Giant Robotic Donkey Kong Jesus riding a puff of smoke blowing up. You know what? Just watch it.
- All the cast stayed in Chicago for a couple more days to film crossovers after this. Highlights include Linkara being force-read his own Massive Multiplayer Crossover fanfiction by the Sage, the Ultimate Warrior writes a comic series so bad that reality breaks down and Linkara and Spoony keep changing into different Alternate Universe selves and the Critic and Nerd joining forces to review... a Making Of of a Teenage Mutant Ninja Turtles Tour. Yeah.
- Later on when faced with Uwe Boll's Alone in the Dark (2005), the Nostalgia Critic gave up on reviewing it. Until! Spoony and Linkara arrived to assist him.
- And kicking off 2010, we have an epic review of Dragon Ball Evolution, starring Paw, LordKat, Rollo T, Hopewithinchaos, and Y Ruler of Time, with guests including LittleKuriboh, MasakoX and The Happy Video Game Nerd. This was recorded while everyone was attending MAGFest.
- The Two Year Anniversary is another huge crossover event. And in turn, it allowed some once-in-a-lifetime crossovers as by this point, quite a few reviewers are from around the world.
- In 2011, things repeated. Y Ruler of Time used MAGFest to do another multiple reviewer crossover (The Last Airbender, with Todd in the Shadows, JesuOtaku and RolloT, plus various cameos). And Year Three had a crossover series and various individual joint reviews (Todd even opens his one saying that the trip means crossovers... and gets shot down by three people before Film Brain accepts to watch a movie with him).
- And once again in 2012. However, this time it was Linkara that used MAGFest for a multi-reviewer crossover (Southland Tales), and Year Four had a mini series that's a sequel to the previous one and more individual crossover videos.
- How about The Ultimate Showdown of Ultimate Destiny flash video? Good guys; bad guys; explosions as far as the eye can see. Way too many pop culture icons to count.
- The Massive Multi-Fandom RPG, taking place right here on our own forums. Princess Tutu, Naruto, Pokémon, The Legend of Zelda, No More Heroes, and Discworld- and that's just for starters.
- Symphony Of The Blood, a fake video game crossover between all the characters of the Star System of Osamu Tezuka.
- The Slender Man Mythos stories tends to have the blogs mix together. For example, M of The Tutorial regularly participates in Damien's blog, Dreams in Darkness.
- TV Tropes' very own Alternate Reality Game The Wall Will Fall has many fictional characters entering the real world.
- Another one from our very own website: The Tv Tropes Pantheon, a massive collection of characters from countless franchises asigned as gods for different tropes.
- John C. Wright has come up with a campaign setting (further down the page) which revolves around "anything goes", and incorporates roughly a billion various setting and universes into one complex setting rife with secret societies and inter-universal conflicts.