No , you don't have to finish the experiment. The first time through, I didn't finish half the stuff. Here are the instructions for the other areas of Spyra in chapter 5. Airship Celsius: watch crimson report 5 at Shinra's station speak to Buddy on the bridge rest in cabin to be awakened by Brother's rambling Speak to Buddy in the engine room Zanarkand Ruins: episode complete listen to Maechen and agree to listen about Vegnagun Besaid Island: episode complete Kilika Island episode complete Luca: mission complete (follow moogle to relive memories of FF X)episode complete Mi'ihen Highroad episode complete Mushroom rock road Mission complete(fight with Youth League warriors and defeat Lucil) episode complete Go to the observation deck at Youth League headquarters, and speak to Lucil to receive Nooj's sphere board the airship and watch the treasure sphere novie,, 'Deathseeker" at Shinra's station obtain all the crimson spheres and open the sealed door in the Den of Woes. Defeat Rikku,Paine,Baralai,Gippal and Nooj Moonflow episode complete Guadosalam join the musical group in the central square.episode complete return to Guadosalam and speak to Trommel outside the locked door. enter the locked area and obtain Baralai's sphere, the board the Celsius and watch the Yevon's Secret sphere at Shinra's station Thunder Plains mission complete ( defeat the fiends attacking the towers) enter the secret cave and rescue Cid. Defeat the Machina Panzer boss.Episode complete 0nboard the airship, speak with Cid on the outside deck return to the bridge to view Cid's tirade Macalania Woods wiew the scenes at the two springs.episode complete Trigger the scene with O'aka and Wentz near the Travel Agency. episode complete Bikinel Desert Mission complete.(locate the first nini Gatekeepers and return them to the Cactuar Nation at Bikinel) Mission Complete.(enter the Cactuar Hollow and defeat the Jumbo Cactuar) Mission complete.( defeat Angra Mainyu) episode complete return to Cactuar Nation and speak with Benzo Bevelle episode complete Inside Via Infinito, the hidden dungeon at Bevelle, obtain crimson sphere 6 at Cloister 0. defeat Aranea and obtain crimson sphere 8 at Cloister 20 board the Celsius and view crimsom report 6 and crimson report 8 at Shinra's station defeat Trema in Cloister (infinity). episode complete Calm Lands Raise the publicity level of either company to level 5 before entering the Calm Lands. episode complete dispatch 3 chocobos of each level without any of them running away to reveal the Chocobo Ranch's secret dungeon. complete the dungeon.and defeat the Anything Eater. episode complete. Mt. Gagazet episode complete Airship Celsius after getting Episode complete in every location, YRP is presented with the Gullwing's prized Mascot dress sphere talk to Brother and decide where you want to go to jump into the Farplane (any location is fine) Farplane advance to the Farplane Abyss to find LeBlanc waiting for Nooj Airship Celsius after entering the Farplane, board the Celsius and viwe the consecutive family events: speak to Shinra on the bridge, overhear Buddy and Brother on the deck. view the comfrontation with Cid at the Cavin area. return from the Farplane a second time and speak with Rikku an the deck Farplane defeat Vegnagun defeat final boss Chapter complete! During the scene at the Farplane Abyss, press the X button to hear whistling. answer "yes" to view the perfect ending