Recreating gravity in games is harder than you'd think

Gravity is one of the simplest and most complicated things in existence. It's both as straightforward as jumping, and a source of cosmic machinations and monsters that defy the imagination. The entity holding you to the ground right now is the same principle of attraction that leads to black holes – exhausted stars that have collapsed under their own mass, growing denser and denser until, at last, they form a vortex so absolute that time deforms and not even light can escape the pull...
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