Building a multi-hero deck, picking a path on the map and refining synergy card by card: this card roguelite invites relentless optimization. Every win offers fresh cards, relics and branches, and every loss tempts you to retry a rethought build. Co-op, where several players share the run, multiplies combinations and naturally stretches sessions. Its replayability still holds today thanks to the sheer variety of archetypes. Downside: the hunt for the perfect deck can turn into repetitive optimization.