E3 is always a magical time of year. At some point during the week-long event, we're guaranteed to see a brand new game shown off for the first time. It will look absolutely glorious with realistic lighting, dynamic weather, mind-blowing animations, and graphics that look so good and crisp, you'd think they weren't real.
And that's just the problem - they're not.
At this point in development, what's being shown off is more of a "vertical slice" of the full release. However, that slice gets polished to the nth degree, and the team can't recreate that for the entire game within the release window.
Now, to be fair to the developers, this issue usually doesn't come from a place of deception, but more the want to put together a demo or trailer for E3 that aims to represent the final product.
Should developers stop doing this? 100%. But you can't blame them for wanting to make the best possible version of the game they're creating. There's also the rare occasion where we can celebrate titles like God of War, Spider-Man or Red Dead Redemption 2 that end up looking even better than what we saw first.
With all that out of the way though, let's take a look at the worst offenders.