One Eyed Kutkh

Easy one but still can be a little confusing. Wasted my time for a while till I figured it out.

Specially, since this achievement is obtainable at the first scene of the game, before you get used to the style and controls of the game, you may get lost quickly.

As the description says, you have to press the same button 4 times in a row, but the trick is, you have to press the buttons "in the bubble", not the actual switches or the buttons within the ship.

After a point within the story, you will start to control a human and start to climb to a tree-like structure with a few levels. Everytime you climb to a new level, keep walking to the leftern edge first then rightern edge before you actually start to solve what you have to do to proceed to the next level of the tree.

I did a mistake and forgot the visit one level's rightern edge and finished the game without the achievement. Afterwards, I loaded the game from the checkpoint which is located just before climbing the tree, and visited the edge I missed to get this achievement. I didn't have to climb till the end again.

While you are controlling the human, eventually you will meet the alien you were controlling at the beginning of the game. Once both characters meet, as the human character, you will have a chance to ask the ship that the alien stole back by dragging the ship to the alien image in the chat box. Do it 3 times in a row (alien will keep refusing to give the spaceship back) and achievement will pop.

When you come to the climbing phase with human character, eventually you will see a bear family on the above level of the tree. Move under them and select the "climb" option 3 times (your character will fail to climb every time you try) to gain this achievement.

"Explorer" achievement will pop once you visit all exits within the labyrinth. Also for not missing the "Sleeper" achievement, do it in this order:

Once you enter the labyrinth, you will realise there are 4 exits from it. Left, middle, right and top one.

Visit the left, middle and lastly right one in order to get "Sleeper" achievement. After getting this achievement, you will have to use top exit to continue the game and also pop the "Explorer" achievement.