There is a Legacy version here.

High Gravity

Source GM Core pg. 172
As in normal gravity, bodies of great mass act as centers of gravity, but the force relative to the size of the body is greater than in the Universe. The Bulk of all creatures and objects is doubled, meaning creatures acclimated to normal gravity can carry only half as much. Creatures used to normal gravity move at half Speed and can jump only half as high and far. Physical ranged attacks are impossible beyond the third range increment (instead of the sixth). Creatures that fall in high gravity take bludgeoning damage equal to the distance they fell.