Alright, if you want the version that feels like a complete, emotionally coherent marathon, here's my favorite route — it leans on narrative payoff and character development.
Start with 'Fate/Zero' (2011–2012). It’s the prequel and sets the stakes, the darker tone, and the moral clashes that make the rest land harder. Watching it first gives Shirou and Kiritsugu’s motivations major weight later. After that dive, move to 'Fate/stay night: Unlimited Blade Works' (2014–2015) to get a clean, modern adaptation of one of the main routes with sharp action and character focus on Shirou and Rin.
Once you’ve finished UBW, tackle the 'Fate/stay night: Heaven’s Feel' movie trilogy — 'Heaven’s Feel I. presage flower', 'Heaven’s Feel II. lost butterfly', and 'Heaven’s Feel III. spring song'. These are darker and more intimate; they’ll recontextualize events from 'Fate/Zero' and UBW in a satisfying, sometimes brutal way. After those, if you’re curious about alternative takes, watch the 2006 'Fate/stay night' TV series as a historical artifact — it’s rougher but interesting to compare. From there you can branch into side universes like 'Fate/Apocrypha', 'Fate/Extra Last Encore' (wild, experimental), and the enjoyable 'Fate/Grand Order' adaptations — especially 'Babylonia'. For a lighter spin, slide in 'Fate/kaleid liner Prisma Illya' if you want cute chaos. I love how this order builds mood and then lets you roam through multiverses with context, so it feels like a journey rather than a scattershot binge.