Endless Dungeon wants you to play with friends but a lack of shared progression doesn't make it easy

I've had the pleasure of playing Amplitude's Endless Dungeon twice now. My first time—at last year's Gamescom—was a solo hands-on, a chance to freely explore every nook and cranny of its procedurally generated space station. This time I'm invited to try out its co-op, a feature the developer says it's built the entire experience around...
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