The mapper Runsaber has just released the first episode of his project Astral Pathfinder. It is a 3-map pack for the 3DGE engine, showing off what the port is capable of in minor instances, while offering a suited gameplay experience from the author's perspective. While difficulties are not implemented just yet, cautionary play is advised, for this is a beta seeking playtesting outside of his own style. You can find more screenshots and the download link at the development thread at ZDoom.org.