Let's go to 200
1. FFX is the first FF with voice acting
2. FFX was the first FF game to have a direct sequel game
3. FFX was the last FF to have Turn based battle system without the active time gauge.
4. FFX was the FF to feature in battle character switching
5. FFX was the first FF to feature controllable summons
6. FFX was the first final fantasy not to feature a world map that you could walk around on
7. FFX is the only FF to include a theater where you can watch all the cutscenes at any time
8. FFX is the only FF to have someone who is not a villian be the final villain (Jecht)
9. FFX is the only FF to include dolls as a weapon
10. FFX is the only FF to include balls as a weapon
11. FFX is the only FF to feature a zombie as a playable character (Auron)
12. Yuna is the only character in FF to have heterochromia (eyes of different colors)
13: Final Fantasy X is the first Final Fantasy where you could customize weapons.
14: Final Fantasy X is the first Final Fantasy where you could customize armors.
15: Final Fantasy X is the first Final Fantasy to have a sphere grid type system.
16: Final Fantasy X is the first game to introduce blitzball.
17: Final Fantasy X is the first final fantasy where you could choose to build up "Limit" gauge in different ways.
18: Final Fantasy X is the first game to have summons with limit breaks.
19: Final Fantasy X is the first game in the series released on PS2.
20: Final Fantasy X is the first game to have an enemy tougher then Omega Weapon.
21: Final Fantasy X is the first game where you could have more then 9999 HP.
22. First FF where the main character is no longer around at the end
23. First FF to include different scenarios regarding how you defeat a boss (chocoboeater)
24. Final Fantasy x is the only game in which you get to play as a celebrity from RL (Meg Ryan) xD
25. Final Fantasy X is the only game where you can only name the Main character out of your entire group.
26. FF X is the first ff to not feature a drivable airship
27. FF X is the first 3D FF to not open with a CGI cutscene
28. FF X is the only FF that allows you to enter airship coordinates to unlock new areas.
29. FF X is the first FF to allow some items to carry over from playthrough to playthrough.