This is a guide for obtaining the Good Ending in Chrono Cross: The Radical Dreamers Edition.
The Good Ending is the best (and recommended) ending that you can obtain during your first playthrough of the game.
Step 1: Obtain the Chrono Cross
Before anything, you will need the Chrono Cross Element. This can be obtained after Chronopolis. With the Tear of Hate and the Tear of Love, make for the Divine Dragon Falls in Another World. For full details, please check the linked page.
Once you’ve got the Chrono Cross, when the time comes, allocate it to Serge’s Element Grid, ideally in the Level 1 position.
Step 2: Use the Chrono Cross Against the Time Devourer (True Form)
During the final battle with the awakened Time Devourer at Opassa Beach (not at Terra Tower), you must cast the Chrono Cross Element after performing a specific sequence of Element colors. Towards the end of the game, you’ll receive various clues about the order of colors.
Anyway, the order is: Yellow, Red, Green, Blue, Black and White.
To achieve this sequence, you can use any Elements–only the color matters. We recommend allocating Level 1 Elements of all six colors for all 3 party members. However, there’s a little problem: Elements casted by the Time Devourer will add to the sequence, usually disrupting it.
When the battle starts, perform standards attack with every character until their Elemental Power Level is at least 2–and 3 for Serge. Then Defend until the Time Devourer casts an Element–usually Omega Green at the start. Next, make Serge cast a Level 1 Yellow Element, then have your other two characters continue the chain with Red, then Green Elements.
Afterwards, you should get another chance to cast Elements for your party again. So quickly cast Blue, Black, then White. At this point, the Time Devourer still won’t have acted. Before it gets a chance to act, do the deed–have Serge cast Chrono Cross, which will instantly end the fight.
See the good ending.