Endymion

A collision with an alien spaceship leaves you stuck on a planet, your ship destroyed, the alien ship still semi-functional. Explore it, figure out what everything does, and find a way to be rescued. Helpfully, everything on their ship is labelled, Adam West's Batcave-style. Unhelpfully, it's all greek to you. Alien-greek. A giant translation puzzle, like a scaled-up Ritus Sacri, or a scaled down Heaven's Vault, but with added gadgets and gizmos. It's extremely player-friendly: An on-screen map, built-in hints, external invisiclues, hyperlinked words: click on one to either examine it or try translating it... All your translations are available in the excellent "Vocab" section including where they were found and other objects that also bear the same words.

A compelling experience, technically polished and enjoyable. Difficulty marred the second half of the game: some of the logical leaps between (Spoiler - click to show)activating and using the teleporters and figuring out (Spoiler - click to show)the scanner is transmitting to the aliens seemed to be underclued (even in the invisiclues): it's difficult to deduce if you haven't already fully translated everything by that point, and it's very possible to just stumble into that situation without having a full grasp of the vocabulary.