I saw a few videos of Deep Sky Derelicts on YouTube. The art and theme made me pause the video and go buy it before resuming. One of the videos I watched compared it to early Darkest Dungeon. You know, right when it was released? There wasn't much to it but the potential was there.
In a sentence: Hub-based dungeon exploration where you're intended to die repeatedly.
You've got a party of three. You can choose their class at the beginning but that's it. Each comes with a different loadout of equipment. Generally that's a weapon (or two), a tool (or two), and a shield. Each item gives a selection of "cards" that are randomly drawn from at the beginning of combat. Continuing the card theme, I'm pretty sure skills are shuffled back in immediately after use. You can also add two mods to each item, adding more cards to your deck.
You grab quests from the hub. You head out to derelicts. You explore, gathering loot and experience and using energy. You head back to the hub to sell your loot, hand in any quests you might have finished (you don't have to complete them in one go), and refill your energy before heading back out.
You're going to have money issues unless you play smart. When you start off, you may notice that you begin with 1500 credits and there are many nice items you'd like in the pawn shop. Those items go for 2-500 credits each. It takes upwards of a hundred credits to refill your energy each time you come back. Healing damage costs several hundred per character. Resurrecting a character takes a thousand. You rarely sell an item for more than a hundred. The starting quests may give you 500 or so, while progressing the main quest may result in 1500.
As I said, play smart. My most successful game thus far has me spending as little as possible on "stuff", instead saving it for life support costs and any healing I may have to do. My equipment and mods come from loot.
The game is heavy on resource management. Keep your shields up so you don't have to do expensive healing back at the hub. Watch your energy, making sure you've got enough to get back to your ship. Energy decreases in combat as well so keep an eye on it and don't enter combat (or just run) if you're running low. You can't completely disregard combat, however - leveling up your characters gives you skill points that greatly improve your surviveability.
The videos I watched:
SplatterCatChristopherOddThe game