This is a shameless plug but an adventure game called Trajectory that perhaps might interest you is hitting steam soon!Trajectory is a first person scifi adventure game that takes place in Earth's orbit, with a dystopian yet whimsical setting. The game has multiple endings and a variety of exotic locations in space and beyond.
We were asked if its a true blooded adventure game as its listed under "Action" too but the main category is definitely Adventure but unfortunately Steam does not list them in order of importance. The game has few action elements but majorly it is a 1st person adventure. Classic adventure gamers are happy to find that the game has several text-adventure minigames within.
Check it out if it sounds like your cup of tea http://store.steampowered.com/app/592620/