Thread:ThePokegeek5000/@comment-36971458-20190509212608/@comment-31984232-20190510044752

Falloff is a damage multiplier - basically makes the guns deal less damage the farther they go. The value is the damage multiplier at the end of it's range, and it's a linear decrease between the max damage and the falloff damage (or increase from 0 to 0 for flare gun)

And the falloff of 10 is probably what allows the flares to go through walls lol.