Xyphles: Baseline explanation of how cave skip functions. needs more work, visuals, more detail, etc.

2026-04-29T17:05:35Z

Baseline explanation of how cave skip functions. needs more work, visuals, more detail, etc.

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== Cave Skip ==
Cave Skip refers to entering the metal head infested cave in the desert early and Percentage Warping to the mission Destroy Eggs In Cave earlier than intended. This glitch is primarily utilized in the No Out of Bounds Restricted category.

== Tutorial ==
<youtube> https://youtu.be/QcjKdZ8FqVk?t=833 </youtube>

== Technical ==
Throughout the years there were various methods discovered for bypassing the egg wall that is supposed to block your entry into said cave most of these are now obsolete but one method is still utilized in the No Out of Bounds Restricted Category. This variant works by wedging the Tough Puppy vehicle into the bottom of the egg wall. The entrance to the cave has no level collision blocking it, the developers instead utilized an actor that has its own collide-shape-prim-mesh which allowed them to cull the actor after the cutscene of Sig destroying it with the peacemaker played. When you wedge the tough puppy vehicle close enough to the wall the collide-shapes of the cars tires slightly clip inside the collision of the wall actor's collision sphere. Theres a method the game uses to avoid actors clipping into each other like this called [https://github.com/open-goal/jak-project/blob/36d8213dfbb10c15e3537b6347e8414185084c6b/goal_src/jak3/engine/collide/collide-shape.gc#L2333 do-push-aways] which runs after a should-push-away-test succeeds. If the car is positioned correctly this can push the wall actor far enough away to leave a gap between where it used to be located and the main levels collision big enough to drive the car into the cave and make your way far enough in to hit the trigger that Percentage Warps you to the Destroy Eggs In Cave mission. One minor version difference to note is that at the time of writing on Opengoal the eggwall only seems to be pushed to the left leaving a gap on the right but on PS2 and presumably all other console versions the eggwall can move either left or right and leave a gap on either side.

Cave Skip - Revision history

Xyphles: Baseline explanation of how cave skip functions. needs more work, visuals, more detail, etc.