Final Message is one of the Collectibles in Control. It is an unofficial recording made by Dr. Casper Darling.
Transcript[]
[camera starts rolling; Darling is shown shirtless, staying silent]
DARLING: I'm doctor Casper Darling and this is my final message. It's not the end, but after this I won't...
[cut]
DARLING: I've exposed myself to Hedron resonance, fully. It's changing me. I've seen- I've been shown so much. Slidescape-36 was where Hedron stopped the spread of another... it's terrifying, it really is... another source of resonance. Trench was exposed to this other... It will now spread...
[Darling takes a breath]
DARLING: I've done everything I can to stop it, the Hedron Resonance Amplifiers... I don't know if it'll make a difference.
[cut]
DARLING: I won't be here when it happens. I should have told Emily more. I'm being sent one more lesson. something[sic] wonderful, I think...
[Darling walks to the camera and shuts it off]
Location[]
This Collectible is automatically obtained during the main story mission Polaris after reaching the control room in the Hedron Resonance Lab.