Lightstep Chronicles got a released date for August 1, 2019.
This game is a narrative adventure set in a sci-fi universe. This means that you will be trapped on an alien vessel with an insane AI. That does sound like some kind of Portal, but that is not a bad thing at all.
More precisely, Lightstep Chronicles follows Captain Cain Phoenix as he gets trapped inside an alien vessel by an AI with a split personality disorder. To rescue his crew and himself from this situation, he will need to resort to his communication and negotiation skills, which will give him access to various parts of the ship and its features.
The game consists of text-based dialogue between the player and the AI, with a series of puzzles and cut scenes. It also has different endings, depending on your choices through the game.
The universe is actually based on the comic book series of the same name (from Kickstarter), published by Dark Horse Comics.
it is not necessary to know the comics, but it can help to see some references, or recognized some visuals and find it more familiar.
Oh, did I say that there is a free demo here?