Is HyperRogue the only game where tessellations of non-Euclidean spaces play a major role? Well, no -- while the wonders of hyperbolic tessellations are rarely used, spherical tessellations can be found in any game using dice! When you roll a die and see how the numbers change, interesting things happen as a result of the difference in the geometries of the die and the surface. Many HyperRogue players are dice collectors. Why not have both?
Meet the sentient dice in the Dice Reserve! They like to be in the position where the highest number is on top, but some bad guys rolled some of them into other positions. Will you help them?
Dice Reserve can be found when you have at least 90 (150 in Orb Strategy Mode) treasure.
Every land in HyperRogue comes with a new Orb -- a sphere of beneficial magical power. The Cursed Canyon is a land full of Curses. Curses are similar to Orbs, but their powers are mostly negative. You may get weaker, slower, powerless, or afraid of water. You get cursed by moving over curses, or when attacked by a Canyon Hag. You are also pursued by the Shadow, already known from the Graveyard. Will you be able to survive and profit despite all the debuffs and nasty enemies?
Cursed Canyon can be found when you have at least 36 (90 in Orb Strategy Mode) Elixirs of Life, Pirate Treasures, Chrysoberyls, Tiger's Eyes, or Powerstones.
When HyperRogue was first released, it had only the traditional-style roguelike "graphics": # for walls, letters for monsters, dots for empty spaces. These visuals were truly amazing: easy to read, and let your imagination run wild, better than any graphics. But art is needed to, to feed the imagination. How would a non-Euclidean space really look? HyperRogue took a rather surprising path, starting with vector-based 2D graphics, then 3D effects, experiments with full 3D geometries, ultimately becoming a rather universal engine for non-Euclidean visualization.
Now, the RogueViz engine supports Virtual Reality (SteamVR)! This brings a new twist to HyperRogue, as well as the non-Euclidean falling block game Bringris and the RogueViz demos. Turn HyperRogue's FPP mode into the immersive experience. There are many interesting choices when designing non-Euclidean VR visualizations. The geometry works differently in a non-Euclidean space, so some obvious things in Euclidean visualizations (including tons of so-called "non-Euclidean" videos which have nothing to do with non-Euclidean geometry) are, well, no longer obvious. Should the relative headset movements be translated exactly to the virtual space? If so, if you move to another place in VR and return to where you started, you are probably NOT in the place where you started in the real world. And vice versa. This is because the geometry works differently! How should the binocular vision work? Should we just render the inner view from two points? If so, distances are not perceived correctly, and in the recently introduced even weirder geometries this does not even work, so we might want to use other methods. The engine lets you configure various details, such as the above, the length of the absolute unit (i.e. the scale of the non-Euclidean space), and so on. Hyperbolic crochets are much better in real life than any images or videos can show -- but you can get some of the fun by playing HyperRogue on the Hypersian Rug in VR. The 3D models are still not great (roguelike players do not need this stuff), but if you want to play FPP mode with monsters shown as letters, or view the classic Poincaré disk or any other 2D or 3D model in VR, this works too, of course!