Invulnerability Glitch
Invulnerability glitch, sometimes called invul, is a glitch that allows Jak to stay alive while in a dead/dying state. The glitch is primarily used in the Any% and Gunless categories to assist with boss fights and make specific skips possible. The glitch is removed by bonking into a wall, clipping inside of an enemy's character model as it attacks, using the warp gate, dying in the void, resetting mission, loading a save file, or dying by too much fall damage.
Tutorial
Technical
The invulnerability glitch has two different states: State 1 and State 2. More commonly referred to as Invul 1 and Invul 2. To enter State 2, Jak must first enter State 1 and then take fall damage.
There are a few known ways to enter State 1 invulnerability:
- Dismounting the JET-Board in a death plane on the frame Jak should die
- Taking damage on a certain frame during the Restart Mission sequence
- Swimming up through a plane of Dark Eco (diving into the side of a Dark Eco pool)
Invul 1
- Enemies will no longer target Jak.
- Jak can't pick up ammunition, skull gems, eco, or precursor orbs.
- Jak can't use vehicles, weapons, Dark Jak, or the JET-Board.
- Jak can't speak to non-playable characters or side mission holographic terminals.
- Jak can't ledge grab.
- Jak can walk on all death planes except the void.
Invul 2
To achieve the second state of invulnerability, Jak needs to take fall damage. Or splat as most people call it. The splat animation that occurs when taking fall damage acts as a check that lets the game know that Jak is still alive. After the splat, all of the side effects of Invul 1 will be negated except the main invulnerability effect.
Discovery
The JET-Board method of entering the invulnerability state was discovered by Djtomjak73 on September 11, 2015.