Suikoden 2

When trying to recruit the 108 stars, make sure in Muse you talk to Clive. If you do not do this he will not appear in South Window and you can never get him.

After the final battle, when you return to your castle and are asked about leadership, choose "I can't do it." Then use the blinking mirror to return to the castle where the last battle was (L'Something or other) and head southeast along the path until you reach Tenzen path. Follow to the end and you will see another ending.

To get the best ending, you must have all 108 characters before you talk to Shu about the Rockaxe mission. Also when you near the end of Rockaxe Castle, when Nanami jumps out to protect you from Gorudo, you must answer very quickly (doesn't matter which answer you choose). If you did this correctly, after Dr. Huan reports of her unfortunate conditon, he should ask to talk to Shu in private.

Did all that? Alright, then once you've beaten the game, head back to Tenzan Path (northwest of Kyaro) and return to that place by the waterfall. Jowy's there, of course, and you'll go into a duel with him. Just keep on defending throughout it. After that, he'll ask you to take his Black Sword Rune. Keep on refusing. Once you've refused enough, Leknaat will appear. I won't spoil the rest, but those are the requirements for getting the best ending.

When you are preparing to jump into the river in the beginning, Rowd will have a group of soldiers attack you. When he runs off answer Jowy so that you won't jump off, Rowd will return with more soldiers. Do this 108 times for a color intro.

This isn't that great, but it is a commonly unknown secret, and it levels up your characters as well. Also, sometimes it won't work if you do it 108 times. I t is a real pain to get to 108 and not have it work, so do it 110 times and be safe.