Alright, OP impressions. Free games/demos only:
Drei: While I like the "toy" aesthetic and sound design, the gameplay didn't grab me. I'm kind of tired of ''balance games''.
Axyz: Apologies for being so reductionist, but this is basically Portal with a half-baked puzzle mechanic and terrible jumping controls. On top of that, it's rather buggy.
Beyond Perception: Amazing proof of concept. Mémorial is one of the most haunting levels I played in any game - really powerful, not only due to its historic meaning. I think this needs to be shared with the rest of Gaf.
Cave! Cave! Deus Videt: It's a visual novel and a very unique one. It deals with Bosch's Triptych of the Temptation of St. Anthony and .. that's all I can say about it. I'd love to talk about this game, so give it a shot. It could very well be out of Simogo's portfolio.
Chrono Disfunglement: Stylistcally impressive for a student game, otherwise a bit uninspired. You push blocks and manipulate time. Give it a shot if you're into that.
Demon Drum: I agree
with Panda, the premise is interesting, but man is it ROUGH to look at. I would also add that they could do way more creative things with the laid out foundation.
Heavy Bullets: I had a feeling I would like this. The movement feels great, aesthetically it's very pleasing, and it's addictive on top of that. I think I'll never forget to load my gun in any game ever again.
Flicker: Welp, this created a virus on my laptop every time I started it up. I assume it's a false positive? Good times.
Monochroma: Limbo-esque in almost every aspect. I had a good time with the demo, even though the controls are very laggy (might be my laptop?). Seems neat, though I'd expect them to spruce up the character models a bit, they look unfinished.
Null Divide+: An innocent little 2D top down shooter going for (and nailing) an NES vibe. I have a blast playing it, GAFfers make the best games. I'll go back to it as soon as possible.
Oniro: You control a girl on her deathbed who's reliving (or "redreaming") the past. That means you revisit locations like your room in your child years, the circus, etc. It's a puzzle platformer that lets you resize objects by getting them near to other objects of a different size/shape. While I like certain (visual) aspects of it, it ultimately feels a bit too cliché and overall forgettable.
Whispers of the Goddess: Great little puzzle game and probably the best Digipen joint out of the bunch. The puzzle mechanics feel fresh, the level design is quite clever and it's rounded out by a lovely and somewhat understated chiptune soundtrack. I'm hoping it doesn't get overlooked.
Paradis Perdus: This game is like a nightmare simulator. Forget all the silly "something spooky is hunting you down" horror games, this is where it's at. Brilliant stuff.
Not from the OP, but I also tried..
Lumen: I'd much rather play Path of Shadows again than this. This team is obviously talented, but I wish they had done without the stealth mechanics (and that awful narration).
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tl;dr: You should try Cave! Cave!, Heavy Bullets, Whispers of the Goddess, Paradis Perdus, Beyond Perception and Null Divide+. Again, it's all free to download.