I feel so bad for No Man's Sky. A lot of gamers expected it to be great but it wasn't. Its idea and graphics were marvelous but it had several problems. Fortunately, the developers did not give up on it and now it is improved a lot.
Sonic 06, it had so much potential but a hard drive failure and lack of back ups really did it in. Not to mention the fact that Sega wanted to rush the game out for the Holiday season, if they took the time to recover from the hard drive failure it really could have been great.
This might not be a popular opinion here but I feel that Palworld flopped big time. I really feel there was so much vacuum in the gameplay. I thought it would be a genre defining game but it didn't meet up to my expectations.