Halo Infinite Secret Achievement Greased Lightning Explained

In Halo Infinite, there are a few hidden achievements that you may stumble upon, and some that are just very difficult to complete. One of these is the Greased Lightning Achievement, which you can only obtain one way.

Here's how to complete the Halo Infinite secret achievement: Greased Lightning.

Halo Infinite Secret Achievement Greased Lightning: How to Complete

You can only achieve the Greased Lightning Achievement in the Spartan Academy Tutorial Mode. To unlock it, you will have to complete the movement course in under 25 seconds. This can be done very easily if you mix up the route a bit.

You'll have to complete the course first in order to unlock the timer, but once you do, just go back to the beginning and hold the confirm button to try the course again, with a timer. Your new path to beat the 25 second challenge will need a few changes, so here's what to look for.

Instead of veering left upon starting the course, jump over the railing to the boxes below, then onto the little edge sticking out of the wall, then jumping up to the next platform where the sliding section is.

Continue on the path, then instead of taking another left towards the bridge, go straight ahead to these boxes, and then jump onto them, make a quick turn to the wall on your left.

Jump to the ledge, aiming towards the corner labeled below, and hurdle over the ledge. Then just make a few more jumps to the final railing, and you should make it to the end in just under 25 seconds.

IGN provides a video walkthrough of this route here, so for a visual guide, check out the video. Upon completing this tutorial under 25 seconds, you'll earn the Greased Lightning achievement.

Halo Infinite's beta is available on Microsoft PC as well as Xbox One and Series S/X now.