GameFAQs (how 2 play game)

Here's a guide on how to get every ending in 1DD. I'm putting this here now because it may be helpful for returning players to progress quickly in order to unlock bonus content.

If you come across a dialogue option and it's not listed here it's safe to assume it has no effect on the ending.

Trait

Attend the Art Club and study history.

• Sit next to Trait.
• Be calm, but assertive.
• Defend Trait and Stoney.
• You should hold them.
• Back up Trait.
• A rabbit wearing a gas mask.
• Ask about the gas mask.
• Believe him.
• Christmas.
• Stick up for him.
• You don’t need him.
• Is Stoney coming?
• Tell me.
• I love that you’re a freak.
• Ask Trait.

Stoney

Attend the Athletics club and spend time working out.

• Sit next to Stoney.
• Tell him to fuck off.
• Defend Trait and Stoney.
• I came because you’re here.
• Back up Stoney.
• Say a stupid pick up line.
• Halloween.
• Get high and write about it.
• You should do research on it.
• It’s chill.
• Ask for the story.
• Don’t undermine yourself.
• Ask Stoney.

Tommy

Study whatever you want, it doesn’t make a difference.

This is very straightforward. Just talk to Tommy and don’t talk to Trait and Stoney. It will automatically put you onto the path for his ending.

Cossett

Study math and attend the Art Club.

• Eat the granola bar and stay in the room.
• Leave them.
• Leave him be.
• Laugh at Cossett’s joke.
• I’m going to study.
• Stay out of it.
• Join Cossett.

Multiple Computer Mark

Study whatever you want, it doesn’t make a difference.

Possibly even more straightforward than Tommy’s route. Just don’t talk to anyone at all. Play this multiple times if you're feeling it.