100% Completion

[SeeDRankLou]

Originally posted by Kupo
In fact- if you buy the official game guide and follow it to the letter, you can get 100% in one game. Without ever having to do New Game+ and giving the sphere to New Yevon.

Almost. If you are referring to the Brady Games guide, it's flawed in two places. The first is simple to spot. It tells you to speak to Barali in Ch 1, but it tells you to do this in the Bikanel section. Obviously you need to do this in Bevelle. The second one is more misleading. At the beginning of Chapter 4, they have badly messed up the order of doing things, and left out a part. Other than that, it's good to go.

It says in Chapter 4 that you should:
rest in the Cabin
watch Crimson Spheres 2 and 3
watch the 4 initial CommSpheres
Speak to Paine on the Deck

when for all the points you should, and in the proper order:
rest in the Cabin
speak to Paine on the Deck
watch Crimson Spheres 2 and 3
watch the 4 initial CommSpheres
Speak to Buddy on the Bridge
Speak to Paine on the Bride

You miss a small percentage if you do the first.

Originally posted by Kupo
The Via Infinito is a completely bonus area. You get no points for going after Trema

Yes you do. It's a small amount, but it does give points.

Originally posted by Kupo
Also, all the mini-game you've listed are optional... however, the Chocobo Ranch gives you pts. as long as you've caught Clasko a chocobo by the end of Chapter Three and have a CommSphere set up there so you can see a few scenes during the Commsphere viewings in Chapter 4, I believe.

You also get points for opening the dungeon and completing it in Ch 5.

Originally posted by Kupo
For the Mi'hen Highroad, you'll get the necessary completion points for any of the suspects as long as you don't choose the Prophet!

Rin and the Prophet are worth the same points (for some weird reason) and Rikku, Calli and the mini-chocobo eater are worth the same (more than the other two). If you get Calli as the suspect however, that means that you have skipped a few things earlier in the game and lost points there. So getting Rikku or the mini-chocobo eater will get you the most points. However, it's pretty funny to watch the Prophet get caught. And there are references to FF7 if Rin is caught.