A term in use by shmup enthusiasts, this refers to the slowing of gameplay that was common on older machines once a lot was happening on screen. Aware this would happen, developers planned around it and players strategized around it. Slowdown is often artificially introduced into modern ports of classic shooters. This term isn’t in use as much among survivors-like players yet, but accurately describes the situation near the end of many bullet heaven runs – sometimes requiring or helping with strategy and other times being totally surmounted by the amount of player attacks.