"Nostalgia buttons" refers to objects or experiences that evoke strong feelings of sentimental longing for the past. They can be things like old songs, photos, or even familiar smells that remind us of happy memories from our past. Full definition
When the Crash Bandicoot: N.Sane Trilogy arrived on PS4 last year, it basically took the world by storm, prodding nostalgia buttons and twitching old muscle memory back to life. (gamesradar.com)
To this day I can remember almost every frame from those early Wrestlemania's and today's screenshots from 2K Games for WWE 2K14's «30 Years of Wrestlemania» mode hits the right nostalgia buttons. (thatvideogameblog.com)
So it's not an exact replica of the original Age of Empires, but it's close enough the trigger all the necessary nostalgia buttons. (coin-drop.com)