In addition to all of the bonus content originally added as part of the PS1 port, the DS version of Chrono Trigger includes an optional touch-screen control scheme, the Lost Sanctum quest hub, the Arena of the Ages monster battleground, a series of dungeons called the Dimensional Vortices, a revelatory new ending, and a polished-up retranslation. The touch-screen controls move battle commands from the top screen into the bottom to free up more space, and the new translation maintains the charm and gravitas of the original while reinterpreting some words and lines to give them a bit more meaning. The Dimensional Vortices and new ending offer additional challenges, new items, and story closure on several ambiguous issues directly relevant to Chrono Cross. The Lost Sanctum is an isolated region that exists in two different eras and is ultimately forgettable thanks to its unimportance to the story and the frustrating fetch-quest nature of its missions. The Arena of the Ages is a new area that lets you adopt a monster and train it to battle against other monsters for potentially useful items. As with the Lost Sanctum, the Arena serves no story purpose, and even the ability to pit your monster against a friend's via local Wi-Fi isn't enough to make it worth accessing regularly.
Visually, Chrono Trigger hasn't changed one bit throughout the years, and its rich, sprite-based graphics, beautiful vistas, and colorful spell effects actually look better than ever on the DS. Similarly, the epic and moving soundtrack brilliantly crafted by famed composers Yasunori Mitsuda and Nobuo Uematsu continues to amaze years later.
Chrono Trigger is a fantastic synthesis of excellent storytelling, game design, music, and gameplay that has withstood the test of time and should be considered required playing for any fan of role-playing games. Though its extra content is hit or miss and it's essentially a direct port of a game released 13 years ago, the DS version is easily the definitive edition of this masterpiece, regardless of whether Chrono Trigger is one of those games you've only ever heard of before or you're a dedicated fan who has played through it dozens of times.