The opposite of a Big Bang. If a universe contracts enough, all of the matter and energy in it will be compressed to a singularity, like a Big Bang in reverse. Arguably, surviving a Big Crunch is a better durability feat than surviving a Big Bang, since the latter involves energy spreading in all directions so you'll only catch some of it, while the former has all of the energy directly concentrated onto you in one point.

According to modern cosmology, our universe will not undergo a Big Crunch, due to the fact that its expansion is actually accelerating (although this may lead to a "Big Rip").

Characters/entities that have survived Big Crunches:

- Durandal at the end of Marathon: Infinity
- Galactus from Marvel Comics
- Downstreamer time portals and the fields they create from the Manifold Series

See also: