On my YouTube channel I've created a gameplay walkthrough video covering chapter 8 of this game.
Chapter 8: Search and Rescue - In this video Isaac is headed to Communications to fix the Comms Array. After fixing the array through solving a puzzle we are able to receive a message from the USM Valor in response to the SOS beacon we sent out. When Daniels tries to reach out to the Valor, we learn there's something is blocking the blast doors over the Comms Array preventing us from deploying the long-range antenna. This leads to a second boss fight against the Leviathan. Defeating the Leviathan Remnant allows Isaac to deploy the long-range antenna, but we contact the Valor too late. It crashes into the Ishimura. We then head to the Valor in preparation for Chapter 9 so we can recover its singularity core.
In this video we find Bailey's RIG, pick up the final upgrade for the Plasma Cutter (which we immediately install and max out), and die 1 time during the Leviathan fight (Total Death Count: 7).
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During this chapter the Get Off My Ship! achievement can be unlocked. At 37 minutes into the video the boss fight against the Leviathan Remnant begins (1st attempt) with the achievement unlocking at 44:45 (2nd attempt successful).
I've created a YouTube short for this as well.
https://youtube.com/shorts/oHiV03pHXtQ?feature=share