OXM reports that, in response to a redditor’s complaint to the UK’s Advertising Standards Authority about the visible differences between the playable and trailer-demonstrated versions of Aliens: Colonial Marines, Sega Europe has agreed to put disclaimers stating that the game shown is the demo version next to their videos.
https://lastchance.cc/the-aliens-colonial-marines-demo-looked-great-the-act-5984024%3C/a%3E%3C/p%3E
Update: Sega has chosen not to comment.