Play Yggdra Unison - Seiken Buyuuden (JP)(Caravan) Online

Yggdra Unison: Seiken Buyuuden came out for the Nintendo DS in 2009, developed by Sting Entertainment. It was part of that wave of late-era DS games that really tried to push the hardware with complex mechanics, even if it flew under the radar for a lot of people. The game is a tactical RPG, but it feels like a deck-builder and a puzzle game got mashed together in the best way possible.

You control a small army of units, each represented by a card, and your main goal is to capture enemy bases across grid-based maps. The signature mechanic is the Unison system, where you drop multiple unit cards onto the battlefield at once to trigger combo attacks or support effects. Positioning and timing are everything, because if you misjudge the order, your units can end up completely vulnerable. The game is fast and surprisingly difficult, demanding quick decisions rather than slow deliberation. It feels like conducting a messy, beautiful orchestra where every mistake is painfully loud but every success is deeply satisfying.