As someone that loves fusing games, portals are an easy tool to use, but a tool used badly can ruin things. Some of the multiverses of various comic settings are examples of things losing value/meaning when not handled with care; Marvel’s Incursion storyline, realities colliding and one being destroyed, can be considered a literal example of the danger of connecting two points that are not normally connected. The implications of Portals are explored in many popular settings, such as Farscape and Babylon 5 (in particular Thirdspace).
In a recent session of Mage the Ascension, (WoD: Sliders) a player that has slowly been learning the setting, is playing an Orphan trying to get to grips with their awakening. The Chronicle is a complex beast, the players’ clue file is currently up to 30 pages of notes, but they have learned that events in the area are connecting different times, spaces and possibly realities in strange ways. One day the party are talking with Hermetics, discussing clues and the Orphan’s visions about ancient Egyptian Gods, the next they have stepped through a Stargate and arrived upon a Technocractic space station. The player was giggling with joy at the vast differences in paradigms and realities, from the ancient world to being in the distant future. Then things got weirder, they were uploaded to the Digital Web, a sector with a Tron aesthetic. They are heading to the Spy’s Demise in tonight’s session. 🙂
All in all I had been worried it would result in genre whiplash, but the player said they loved it; the veteran Mage player did as well, but it’s all normal to them. 😉 I think it was helped by things having been foreshadowed, plus other weirdness building up. Another key factor was that ‘dynamic reality’ was one of the things discussed before even session 0. Likewise with my Fateful Memories D&D PBEM game I’m running, when preparing the game the player was happy to do something a bit different. The character is currently in Sigil. 🙂
Street Fighter RPG
Of course SFRPG already has teleporting ninjas, plus Warrior’s Fist Special 5 (Punho do Guerreiro 5) introduced a Portal Warp power. An empowered version of Elemental Stride, allowing for a team to pass through. 🙂
For my chronicle that was inspired by Mortal Kombat: Conquest, the PCs never developed access to reality portal generation, that power was kept with the Gods and a few divinely empowered items. I didn’t play a ton of Palladium Rifts, as a teenager it was a zany and Mega-Cool (yes, pun intended) game. The player that was introducing me to it was explaining about his plan to play a Juicer that was going to steal a Glitter Boy suit. That is the sort of thing I wanted to avoid with SFRPG game, well unless a group really wanted to play a game that allowed for Mechas performing Dragon Punches. Nope, I have too many games on the go to entertain this! 😉
Other Peoples’ Answers
Charles Etheridge-Nunn @charlie_en
Anthony Boyd @Runeslinger
Bob Freeman @OccultDetective
Sue Savage @SavageSpiel
Craig Oxbrow @CraigOxbrow
Geek-Life Balance @cybogoblin
This is a non-exhaustive list; I still have many posts to read today, so I might be adding more links. I’d recommend searching the hashtag and judge those great answers for yourself: #RPGaDay2020, some people use #RPGaDay.