Undertale

- You can't avoid every fight, but you never have to escalate the violence.

- There is a way to spare everyone.

- There is only one exception to these rules, and you will know it when it happens.

- The Kill Everyone ending means kill everyone, not just everyone who gets in your way.

- You can't open the door with the mushrooms until after you've gotten the true pacifist ending.

- The Stick (your starting weapon) has multiple uses.

- Don't be ashamed of looking up the solution to the piano puzzle. It's optional, but also kind of poorly designed.

- If you buy something from the spider bake sale, keep it around. It might come in handy later.

- You do NOT have to use the fight command on the boss at the end of the ruins. Keep trying, there is a way.

- When a later fight makes use of a points system, using junk food will lower your points, and using glamorous items like glamburgers will raise them. The fight ends when you reach 10000.

- if aware of dog, PLEAS PET DOG