Post game depression 

When you are sad that you are about to beat a game or have beaten a game that has taken so many wonderful hours of your time.

I have been avoiding my favorite game recently because of my post game depression.

Post game depression by SwiftPuncture May 9, 2019

Post Game Depression 

When you feel like your life lost its meaning after finishing a game, this might also be referred as PGD or just depression.

Jesus chirst, I just finished Persona 4 and i have post game depression i cant cope with living...
I get you man i also got PGD after finishing Bubsy 3D.

Post Game Depression by NepaliCook January 16, 2018

Post Game Depression 

When your really depressed after a game because you played horribly or you lost.

He had Post Game Depression.

Post Game Depression by CornBall0020 February 27, 2019

Post-game depression 

That empty feeling when you finish a good game. Don’t worry, it’s natural for the games you get invested in. You’ll get over it. I’m sorry you feel this way, but it’s ok, we’ll help you through it, because gamers are bros.

I experienced Post-game depression after beating the revenge of the Sith video game.

Post-game depression by Random historian July 6, 2022

Post Video Game Depression 

The emptiness you feel inside yourself when you complete the main storyline/campaign of a magnificent game (such as The Last of Us, any of the Uncharted installments and The Walking Dead game by Telltale) and have a brief period of depression where you seem to have no reason to move on with your life.

James: Hey Joe, how was that new game by Naughty Dog?
Joe: Oh, The Last of Us? It was amazing. When the credits started rolling, I went through post video game depression for a short while.
James: I bet. Had the same feeling with Mass Effect 3.

Post Video Game Depression by Lateralus2013 June 28, 2013