Additional DMW character locations - Items

Cactus Thorn: Successfully complete mission 10-1-3 (adds 1000 needles to DMW).
Tonberry's Knife: Successfully complete mission 10-2-3 (adds Murderous thrust to DMW).
Cait Sith's Megaphone: Find in a treasure chest in mission 8-4-3 (adds Courage Boost! to DMW).
Moogle's Amulet: Find in a treasure chest during mission 8-4-4 (adds Moogle Power to DMW, and levels all equipped Materia to Master level).
Magic Pot Tricks: Follow the orders of a Magic Pot (adds Item Mugger to DMW).

Materia - Ifrit Materia: Successfully complete mission 8-1-1 (adds Hellfire to DMW).
Bahamut Materia: Successfully complete mission 8-1-4 (adds Mega-flare to DMW).
Bahamut Fury Materia: Successfully complete mission 8-5-6 (adds Exaflare to DMW).
Odin Materia: Successfully complete mission 8-1-6 (adds Zantetsuken to DMW).
Phoenix Materia: Obtained during "7 Wonders Of Nibelheim" quest (adds Rebirth Flame to DMW).

Easy experience - Use the following trick to get easy SP, Materia leveling, and experience. Once you have got your vacation time at Junon Beach, you will have a new mission under the "Mysteries Of The World" category called "Fun In The Sun!". Successfully complete this mission set to unlock "More Fun In The Sun!" The second mission in this sub-category is called "We Hope It's A Vacation". In this mission, Sea Worms fall out of the sky about a half dozen at a time. This conitinues until about fifty have been destroyed. They are easy to kill, but they can hit you with Stop. You may want to equip Sprint Shoes. Once you have obtained Quake Materia from Wutai's secret shop, you can kill up to six enemies at a time in this mission. Doing so greatly increases your SP multiplier. They also drop a lot of MAG Mako Stones for Materia fusion. The DMW seems to react quite a bit to this mission; expect lots of Modulated Phases. This mission never expires. Kill the worms as much as desired.

Easy gil - Minerva is the goddess of the planet that Genesis sees after his last defeat. She is also an optional Boss that you can fight. She is extremely difficult to defeat. She has 1,000,000 HP and can kill you with one hit if you are not careful. She is under the final "Great Cavern of Wonders" mission. You must have at least 70,000 HP because she has an attack that does damage of at least around 60,000 to 68,000 if you have Barrier and are guarding. You can steal 99 Phoenix Downs from her though. You can use these for unlimited gil and Soldier Points. Steal the Phoenix Downs, wait for her to attack (because you will die), then sell the Phoenix Downs. They are worth a lot of gil. For the Soldier Points, use the gil you got from selling them to buy Materia, then convert it to Soldier Points. Note: Minerva can eliminate Raise status with one of her attacks.

Genesis' Banora hideout - Once you reach the final stage of the game, Genesis' secret hideout in Banora, you must get the Seven Goddess Materia and set it on the pedestal in the Portal of Severance. However, there is an optional section. You can reach it by defeating all the monsters in the Lake of Oblivion. To do this, check all the Lifestream Springs. When Zack says "The Lifestream has ascended and crystallized", it indicates that you have to fight another enemy first. One of them will make an enemy appear. After defeating it, check the remaining ones again to find the one that spawns the next enemy. Repeat this until all the springs disappear, and a pathway will appear in the back. It will lead to an optional section. Here you must defeat enemies to gain keys to the doors so that you may advance. The purpose of this section is to obtain some extra items in the cells. The cells can be opened by turning the valves on the walls next to each cell. Some of them do not have valves. If it has a hole in the wall, you must find a hole that leads you into that cell. If it does not, it is inaccessible. Once you finish this section, you should have gotten the "Iron Bars Key". Use this on the door with the Behemoth behind it. Fight the Behemoth, then use the door behind it to appear in the Portal of Severance on the second floor. All you can do is take the elevator down to the first floor.

Gongaga mini-game - While in the Hills of Gongaga, after you start the scene with Genesis and Hollander, fight up to seven battles in the hills, then try to leave the area. Zack will notice a chest falling down the waterfall. Select the "I bet there will be more" option, and play the treasure chest mini-game. Monsters will come down as well as chests. The boxes and monsters will come down four times, repeating the same pattern:

Wave 1 (chest): Middle
Wave 2 (monsters): Left and right
Wave 3 (chest): Far left
Wave 4 (chest): Far right

These waves will repeat four times after the fourth wave. The more boxes you get, the better the prize. If you touch the monsters, Zack will become temporarily paralyzed. The best way to dodge them is to get out of the river, then go back in once they are gone.

Joining Angeal's Fan Club - In Chapter 8, when you need to make Aerith the flower wagon, talk to the boy in the fountain area of Midgar. He will say that his mother is missing and never came back. Go to the Sector 1 Train Platform, and the mother will be standing by the wall when you walk in. Ask her why she is abandoning her son, and answer "A mother without honor is nothing but a monster." Then, go back to the boy in the fountain area, and you will be in the Angeal Club.

Joining Genesis' Fan Club - In Chapter 8, when you need to make Aerith the flower wagon, go to Loveless Ave. Talk to the Genesis fan in the back alley. Then, talk to the Genesis fan in the fountain section, and suggest that the two clubs join up. Go back to the lady on Loveless Ave., and she will give you a membership to the club.

Joining Sephiroth's Fan Club - To find the woman for admission to Sephiroth's Fan Club, the Silver Elite, you must wait until you can access the Park in the slums. This is after Zack falls from the plate while pursuing Hollander. When you get the chance again, go to the park, and look near the blocked off entrance to the next sector (this is where Shinra will collapse the plate to try to wipe out Avalanche in Final Fantasy 7). She will be standing next to the play set. You may have to move the camera to see her. She will ask you three questions about Sephiroth. Even if you get one wrong, you may try again as many times as desired. Answer all three questions correctly and she will accept you into the club. Unfortunately, there are only a few e-mails from the club, but they are still interesting.

Mission difficulty levels - The game automatically labels missions with a difficulty based on your level. However, it does not take into account stat bonuses from Materia or accessories, so you could actually play a very hard mission and find it to be about normal difficulty.

Completion bonus - Successfully complete the game and save when prompted after the credits. You can resume the game using your cleared saved game file.