No achievement in this game can be missed. They all pop after starting whatever level they're attached to. Every parking level in the game can be skipped without consequence while none of the walking simulator portions can be skipped to my knowledge.

For every parking level in this game, you can simply just push the N key on your keyboard, then push the ENTER key and you will skip the level. You can do this for every parking level without consequence and you still get every achievement. If you would like to play the parking sections, you can feel free to, but there will be no explanations for them in this guide.



After pressing the N key, this will show up.



After you've done that, just press the ENTER key or click yes to skip the level.

At the end of every walking simulator portion of this game, there will be a sort of puzzle to solve in the form of a number combination lock. These puzzles are extremely easy and I believe anyone could get through them without my help. I don't know if the numbers are the same for everyone or if they are different for everyone, but I will have screenshots below showing what the combinations were for me and where to find the numbers in your game if they happen to be different.

If you would like to try and solve these yourself (as they're very easy) and/or not have certain parts of the game spoiled (like one of the gorgeous views) then don't scroll to the bottom section of the guide.

After beating the final walking simulator level, you will get a speech by a character based on your choices at the end of each walking simulator level. After that, you will get the credits section. Do not close the game or go to the main menu. After the credits are done rolling, you will automatically be put into the final parking level, which will pop your final achievement and allow you to close the game.

In this section I will tell you what every combination for every number lock at the end of every walking simulator level was for me (I don't know if they're the same for everyone or not), provide a screenshot of where to find them and a small description of where to find them.

Combination #1: 3234

You can find the combination for the first lock above the mountain you are shown early in the game.



Combination #2: 5972

You can find the combination for the second lock inside of the building the lock is guarding through a window.



Combination #3: 8016

You can find the combination for the third and final lock behind the building that the lock is guarding on a rock face.



Note: If anyone is willing to let me know if the codes for them were the same as the codes for me, I would be more than glad to give them credit in this guide.

Edit: OMGitsLone has since posted in the comments that the codes are the same for everyone. Thanks to them for confirming.