call sqrt sixteen times per frame jam is a jam where you must make a game of any size/type that:

• On each frame update, jumps to a subroutine that computes the square root of a value; this must be explicitly called exactly sixteen times
• That means like calling Math.sqrt(); you can write your own or use that Carmack one that an acquaintance inevitably brought up while you were in class doing something unrelated
• Normalizing a vector (Unity documentation here) counts as a sqrt call; ya punk!
• Saving and reusing results is fun and totally okay (dem pop-sci comp-sci kiddoes call it memoization, wow!)

And that's the jist of it! You have 16 hours, 16 seconds, and 16 minutes. One sqrt call per hour, and some time in-between to like make the game or something.

Some questions you maybe have:

• Can I use a tool/engine/framework I like?
  • Yeah! Of course.
• Can I work in a group with my best friend(s)?
  • Yes but you have to divide up the sqrt calls evenly fairly
• Can I start early?
  • You can, but only because I like you 😉
• Can I skip on the square root function?
  • No and I wanted to use a disapproving GIF here but I wasn't sure how to get a caption so it would be accessible for people with screen readers and I'm too afraid to ask leafo how to do it
• I have a question not mentioned here
  • Feel free to reach out to @danielsavface on Twitter if you have questions!