Heaven’s Vault is a game about archaeology and translating a dead language. You explore a unique solar system and discover ruins, in which you uncover artifacts, and bits of text. Through context clues, you translate the passages to uncover the storyline. It’s not difficult, so if you’re looking for a puzzle, this won’t really do it for you, but it’s more of a narrative experience. If you aren’t sure about a word or phrase, you can give it a guess (based on assigning words from a collection of possible translations to specific symbols), and the game will remember that choice and let you slowly revise your translations as you find new text that rules out prior incorrect guesses. There’s an interconnected storyline with multiple paths to follow, and a very unique world - haven’t seen anything like it in other games.
The game has a NG+ mode wherein you start with all of your translations from the first playthrough intact, but, most of the bits of text are considerably longer and more involved, letting you use your prior knowledge to uncover more of the story and the lore of the world, which is also neat.