Picture a game told entirely in second-person prose. You are standing at a crossroads. The left path leads to the village you grew up in. The right path leads to the capital where your father was executed. The player picks one. The story that follows depends on that choice and every choice before it. Two hours in, no two players have had the same game.

Summer Engine helps you write that story through conversation. Describe the world, the protagonist, the branching structure, the variables you want to track. The AI helps you set up the story architecture so you can focus on the prose itself: the word-by-word craft that makes interactive fiction special.

The best interactive fiction treats the reader as a co-author. Variables accumulate into a unique state that shapes what story is possible by the final act. Give the player enough agency that their fingerprints are on the ending. Let the prose reward close reading and careful choices.

• Writers who want to build branching prose fiction without managing a complex visual or audio production.
• Authors with an existing prose style who want to bring interactivity to their genre of choice.
• Developers building narrative games in the tradition of Twine, Ink, or ChoiceScript who want more production value.
• Solo devs targeting the itch.io or Steam interactive fiction market with a strong literary concept.

• Branching Short Story

  A 30-60 minute interactive story with multiple endings. Strong prose voice, tracked character relationships, and a branching structure that makes replay reveal new perspectives.

• Choice-Based Novel

  A longer narrative with stat tracking, relationship meters, and a world that changes based on accumulated decisions. The protagonist's identity shifts with every choice the player makes.

• Epistolary Interactive Fiction

  A story told through found documents, letters, and recordings. Players choose which to examine and in what order. The narrative assembles from fragments.