What bad game had the most unexplored potential?

Age of survival?

Rock simulator 2016.
I think you can say this if you are playing multiplayer game and some of your friends is connecting slowly
Rock simulator 2016 buy it for 10 buck its out everywhere ANYWHERE!BUY NOW!!!

I Am Alive is one that comes to mind.

The Movies ༼ ಥل͟ಥ ༽

Murdered. I loved the premise soooooo much. And it was soooo "kinda ok-ish" game. I didnt hate it, but it could be awesome.

Banana game

Neverwinter Nights 2.

The entire portfolio of Lionhead Studios.
Anything UbiSoft made in the past 3-4 years.
Maybe Destiny, if it had a properly built world and the gameplay would consist of anything but mindless grinding or half-working PvP.

Too Human. Cyberpunk norse mythology, trilogy of games with an epic story set, 10 years of development hell...release the worst game ever made where you literally can't die.

Ride to Hell: Retribution. the setting is interesting, but the game is so extremely bad. i played it for a few hours, just to enjoy the horrible cutscenes, the crappy voice-acting and the worst gameplay i experienced in a while.

Punch Club is the one wich is coming first into my mind. While approximately the first half the game was lovely and nearly perfect at some point it seemed like the developers had to rush and couldn't give the same effort for their project to the rest of the game and thus couldn't keep that quality level.

I don't know if it can be considered "bad" in the way that some of the other games mentioned here are bad, but Star Wars Battlefront's lack of single player was pretty disappointing. There's still hope though of them correcting this with DLC though I suppose and making more use of the amazing environments they've built.

Ultima Online had a lot of potential that never got beyond beta. Leading to a different and less interesting game than it could have been.
The organic life engine is what I'm referring to for example -> https://en.wikipedia.org/wiki/Ultima_Online#Development

Superman 64.

If you look at the beta, there's a lot of stuff that they were trying to do and had to drop. A lot of it had potential. Some of the hints are even still there, like the ring level where you're chasing a very tiny Mala around the city for no reason and then she vanishes. The majority of the game was supposed to take place in the legitimately huge city, instead of all the plot taking place in poorly designed interior maps. I think if they had been given full control and no deadlines, and maybe waited until the next generation of systems for draw distance, we could have had a legitimately fun Superman game where you fly around the city finding clues, stopping crimes, and defending citizens. Instead, we got Superman 64.

CS:GO

I'm gonna put No Man Sky on the list.

Consortium. It has a tremendous background. With the right budget it can be a epic as Mass Effect.