Though the deck-builder is running the risk of being overexposed, Roguebook has enough interesting ideas at play to make it a worthwhile investment of time. It’s not likely to replace Slay the Spire or Monster Train for fans, but it carves out enough of its own niche that I can see it existing side-by-side.
The lack of depth isn’t too much of a detriment as the game is short enough to ever feel tired. Better yet, what is there is good, a foundation with easy room to be expanded upon and a strong demonstration of Cold Symmetry’s understanding of core concepts that are the strength of the genre. Mortal Shell is a exemplary use of limited resources to make a tight, fun game, even if it only takes a weekend to beat.