In many games, you probably encountered steam achievements to be something like finish the first level or complete the main story quest. Achievements that you will receive just by playing a game. So when steam recommended to me that I should have achievements in my game, I didn't want to have these kind of achievements. I made a decision to made them a little bit more fun. There is one achievement for every level. They are more of a playful challenges. For example, in one of the levels you jump out of the hyperdrive right next to an unstable star that is producing solar flares. The first one hits you very soon, so you have to run. After the flare is over, you should return to nearby base and recover the necessary technology. You may try to land on the base and discover the technology before the first flare hits you. In this case, most probably you will not have enough time to get out and you'll get incinerated, but the achievement will be yours.