The phrase "damage numbers" refers to the numerical values that represent the amount of harm or injury caused by something, such as in a video game or a real-life situation. It is used to describe the extent or level of damage done.
Sentences with «damage numbers»
Human - caused fires have also destroyed or damaged a number of these plants. (discovermagazine.com)
The layers of level values, stats and damage numbers in Destiny can give the wrong impression. (pcgamer.com)
This time around, we've added damage numbers. (rollingstone.com)