You know, it somewhat surprises me that despite how popular the Fate/ Series is, there has only been one official fighting game based off of it. Here is a place to share your ideas for what a new Fate/ fighting game could include.
I'll start with some concepts of my idea.
1. Master/Servant pair system. Servant is the main fighter controlled while Masters determine Servant stats and perform "assists". Master/Servant teams are customizable with different Masters having different effects (ie: Dark Sakura gives the Servant a large mana pool but in turn makes them slower; Shirou and Kuzuki give the Servant a low mana pool and stats but can perform very effective "assists"). This way, unique Master/Servant combos can be created to serve different playstyles or head canons.
2. Large Playable Cast. Servants and Masters from FSN, Zero, EXTRA/CCC, and Apocrypha are all playable/usable.
3. Story mode for several different Servants following their roles in the series with major battles and the appropriate Master for each (ie: Saber's story would start with Zero with Kiritsugu as her Master, then move on to FSN with Shirou and Rin). Choices are presented between some battles to alter the story (ie: Choosing between Fate, UBW, or HF in Saber's story) leading to some "what if" scenarios. Think something kind of like the story modes in the DBZ Budokai games.
Thoughts? Criticisms should note that I am doing this at 4 in the morning.