Xenogears

There is a very easy way to beat Calamity even when your levels are kind of low. The main thing you should do is to buy a new engine for both Weltall and Brigadier from the old man in the cave . The engine output determines how much power your attacks have, and your beginning engines are just too weak to do and damage to Calamity. After buying the engines, you might want to also buy a stronger frame and some extra armor pieces. Then just use what attacks and deathblows you have and it should be rather simple to beat him.

Press L2 + R2 when on the world map or at a place that you can use your Gears to hop in and out without going to the menu.

Lucca from Chrono Trigger is in Xenogears. After the game first begins, take control of Fei and go to the Information House (left of the Elder's House). Look closely to see that it is Lucca that teaches you about Save Points.

This isn't a cheat, just a hint. Anyway,. here's what you do. When you start a battle with anyone (People not robots) just use the combination X,X for your attacks.(assuming you have 6 combo points available) When you do this you will get points towards learning new deathblow techniques. Note that this is faster than using previous deathblows.

When fighting Dan in the contest, don't hit him. Just heal your self if you need to. After a wile Dan will stop and talk to you. He will then give you his sisters wedding dress.