There are many more games to play on Game Pass for quick gamerscore, such as the TellTale Walking Dead titles, Goat Simulator, Tell Me Why, etc., but this list should act as a great jumping-off point for your achievement hunting journey.
This list of games with easy achievements on Game Pass should be very helpful in getting you those easy G’s without the punch to your wallet. This video guide will cover this in more detail. This is heavily RNG-dependent unfortunately, and may be a real grind because of it, but use the custom night you unlocked after beating the main game to help you die quicker. The other requires you to complete the four minigames that can sometimes start after you get jumpscared. One of those requires you to simply be jumpscared – easy enough.
This makes the game very easy to complete, and you can use this method to unlock all but two of the achievements. By hovering the cursor over Freddy’s face in the poster on the left side of the room, then hitting C, D, and + together on your keyboard, you can skip through each night individually. Last but not least, Five Nights at Freddy’s 2 is another easy completion with a trick exclusive to the PC version.