Take one look at Luna Abyss and you'll probably go, 'Wait a minute, this looks like first-person Returnal!' And having played the first mission of the game at GDC, I can confirm that yes, this is very much in the vein of first-person Returnal. It's a fast-paced, bullet hell shooter set on a strange alien moon where everything's out to get you, but the shift in perspective makes everything in its titular abyss feel closer and more intimate, calling to mind the frantic, confined gun fights of Doom and Quake more than Housemarque's seminal roguelike - games that creative director Benni Hill tells me were formative experiences for him growing up.
There's also a greater emphasis on story-telling in Luna Abyss, with Hill also citing Nier: Automata and Bioshock as other key influences. It's a compelling mix, based on the first chunk I played, and arguably one of my surprise GDC favourite demos alongside The Thaumaturge and The Lamplighters League. Indeed, Hill tells me they started working on Luna Abyss a year before Returnal was even announced, and when they first saw it during Sony's PlayStation 5 reveal stream in the summer of 2020, he and his team did a collective double-take.