Black Mesa
Once upon a time, Valve released Half-Life: Source. Everyone expected it to have improved visuals, but were disappointed that it was merely a port. The water looked better, but since you're not looking at water for 99% of the time, that's not an improvement. Some industrious fans decided to make what they expected it to be, calling their project Black Mesa: Source. They set to remake Half-Life to a standard comparable to Half-Life 2. After practicing some mandatory Valve time, it appeared as a mod in 2013. A blogger wrote about it in 2014. Valve blessed the project, even granting permission to sell it on Steam. It released in 2015 with the same levels as the mod. They promised the ending Xen levels, which released in 2020. Said blogger bought this months ago, and it has been mocking him from his Steam library ever since.
You can't complain about this anymore. It's perfect!