Interplayer

Interplayer is a programming puzzle game framed around recovering data that a doctor has intentionally deleted from a project. You move your character through each stage, picking up tokens and arranging them into source code that produces the required outputs for the given inputs. Tasks include doubling a number, converting it to an n-decimal number or multiplying it by 10; for example, the inputs [3, 6, 10] must produce [30, 60, 100].

Program with tokens

Instead of typing freely on a keyboard, you build programs from tokens. Each stage limits which tokens you can write and how many times you can use them, so you must meet its input-and-output requirements within those constraints. The game uses tolerance language, a programming language made for Interplayer, with readable syntax influenced by Python. Its in-game references explain the language, which includes simple functions and control statements such as if and while.

Stack statements

The stack statement changes the order in which an expression is written. For example, a = 1 + 1 becomes 1 1 + = a, making the sequence in which you collect tokens relevant to constructing the statement.