It depends. In my experience, most demos stay up, and the few that are taken down sometimes explicitly say so on the store page or demo announcement.

Neverlooted Dungeon: Comedy dungeon crawler inspired by games like Ultima Underworld and Arx Fatalis. The demo consists of a tutorial and a small open-ended area to explore, with a focus on avoiding traps and interacting with physics objects to navigate and find loot. The demo doesn’t really show off Arx-levels of complexity, but it’s fun to explore and genuinely funny at times.

Stop Dead: Fast paced first person shooter where you attack enemies by using telekinetic powers to hurl objects and bodies to deal damage. The weapons work kinda like Mirror’s Edge, in that instead of getting your own loadout you pick dropped guns up off the floor and get rid of them once they’re out of ammo. Also, if you stop moving for more than a moment, you die. Demo is quite varied, and ends with a challenging mid-game level to show off the mechanics a bit more.

Mr. Run and Jump: Challenging 2D platformer with a lot of different moves that can be chained together in slick ways. There’s not much of a narrative and the neon visuals kinda look dated in a not-even-retro way, but the movement really carries the whole game.

Echo Point Nova: New shooter by the developers of Severed Steel. Has a lot of the same mechanics (slow motion, destructible terrain, etc), but makes the levels a lot more open and adds a grappling hook and hoverboard for a different style of mobility. There’s a bit of jank, but it’s very satisfying to play.

El Paso, Elsewhere: Indie Max Payne. I’m not exaggerating, it plays like Max Payne 2 and looks and feels like Max Payne 1. Swap out the main character and it could pass as a phenomenally faithful fangame.

Phoenix Springs: Stylised neo-noir narrative-driven point and click adventure. I usually don’t have the patience for these sorts of games, but I found the writing and visuals very compelling.

Fortune’s Run: Sprite based RPG FPS with level design that feels a bit like the classic Deus Ex, but with the fast paced combat of a boomer shooter. Has a Star Warsy rough and gritty sci-fi setting, if you’re into that.

The Next Fests are my favourite Steam event by far, already looking forward to the next one!

In what situations is this a blocker for gaming? Like, genuinely, who actually had any significant issues from it? Top 1% Counter Strike pros? I’ve been playing games on Wayland for ages and I never understood how anyone can think the experience is worse, let alone so bad it’s unusable.

Ooh, I love finding obscure indies. There are an awful lot of games on Steam and Itch and other platforms that are amazing experiences, but that almost no one has ever played or even heard of for one reason or another.

One of my recent favourite zero-budget indies is Sally Can’t Sleep, a strange first person platformer with a lot of focus on fun, versatile, and exploitable movement mechanics. The dev sacrificed visual polish for quantity and style, so the game has a lot of interconnected levels with a big variety of different mechanics and visual styles - it’s a really good example of how much a solo developer can accomplish.

Another one is Worlds, which is a 3D stealth-shooter-platformer-adventure? I like it for the same reason as Sally Can’t Sleep, it’s ambitious and creative, and you can really feel the developer pushing against their limitations to release something that punches far above its own weight.

Also, both these games are very cheap, even at full price!

I haven’t played Doom 3, but it sounds very similar to what Prey 2017 has - all the computers in the game have (in-universe) touch input, so you can use them just by pressing the interact key while looking at a display. You can even fire rubber-tipped foam darts at screens to trigger a click in the spot where the dart hit!