The #FourJobFiesta website has three challenges going on right now. The first is just to play #DragonQuestVII and finish it sometime this year which... yeah, it's a stupidly long game. The second started on the 15th of January and ends the 15th of February: play #FinalFantasyVIII with each of the 6 characters assigned a specific "job" composed of 2 GFs and a set of magic it can use and junction. The third is all February: play #FinalFantasyXII with the Zodiac jobs without resetting them (assigned two jobs, but you can only use 1 if your version only supports that). Eric Koziol has got a Tiltify campaign donating to Trans Lifeline.
Too bad I found this too late, or I might be interested in the FF8 one, although the sets of magic and GFs are a bit on the fiddly side. I prefer rules which are easier to remember and which don't require looking them up, such as only using certain party members.