This year Tetris has been around for 35 years, so anniversary based nostalgia is bringing up a lot of old related links.
This is usually happens more for full decade-a-versaries rather than halfs like this, but 25 happens as it is a quarter of a century and 35 (i.e. this case) seems to resonate with people too (perhaps because it is seen as half a lifetime?). In five years time these links will be back even more so (four whole decades), ten years from now maybe less so, but fifteen years from now it'll be 50 years and the world (assuming the upcoming WWIII leaves enough of us and relevant tech knowledge alive) will be tetris-nostalgia-batshit.
That, and it is the sort of great "cool sad" project that is worthy of people being reminded of occasionally.