ETAB is a relatively simple, but inconsistent at the moment, glitch that can be used to bypass nearly 60% of the game. It allows you to push past the one-way pipes that lock you out of areas until you get the respective upgrades to enter through the correct side.

It is called ETAB because you're essentially pressing E and Tab at the same time. It requires you to have Xiphorrea (Blade Dash) and Parasitism. Hold E to dash, but when the arrows first show up for your dash, press tab. Press tab again to exit parasitism while still holding E. You will fly forwards at a very high speed, allowing you to clip through one-way pipes and (somewhat) into a wall. This can be used to skip everything that comes in the game after Relith HQ and return to BSL-4 which requires no more than dash to progress through.

ETAB was found by H1pp0_ at roughly 3am CST on July 28th, 2020.