In response to an investigation from the UK's Advertising Standards Agency, Sega Europe have acknowledged a consumer complaint that the promotional trailers for Aliens: Colonial Marines didn't match the final quality of the game. Reddit user subpardave submitted the complaint to the ASA in response to what he calls the "absurd" difference between in-game quality and the earlier, better looking, demo footage.
"We contacted Sega Europe to discuss the issue," the ASA wrote, in response to the complaint. "They explained that their online trailers used demo footage, created using the in-game engine. Sega Europe understood the objections raised about the quality of the game in relation to the trailers, but explained that they weren't aware of these issues when the trailers were produced, in some cases several months before release.
"Sega Europe acknowledged your objection that the trailers did not accurately reflect the final content of the game. They agreed to add a disclaimer, both on their website and in all relevant YouTube videos, which explains that the trailers depict footage of the demo versions of the game."
It's hard to tell in the light of dry official documentation, but my reading of that above paragraph is that Sega have acknowledged the objection exists, and not necessarily the contents of it and arguments behind it. If so, it's an ultimately meaningless sentence. I can acknowledge that there's a cup of tea on my desk - because there is - but that doesn't address the underlying problems of that cup of tea: namely that I've run out of sugar.
The added disclaimer, now present on the game's website and YouTube trailers, simply states: "The trailer footage shown uses the in-game engine, and represents a work in progress." Of course, from that statement, you'd assume the final product was an improvement. But it's not like there hasn't been warning to the contrary.