For the 3rd one, you are probably thinking about "Elevated", which is 4k http://www.pouet.net/prod.php?which=52938 http://www.pouet.net/prod.php?which=52938 The

For the 3rd one, you are probably thinking about "Elevated", which is 4k http://www.pouet.net/prod.php?which=52938 http://www.pouet.net/prod.php?which=52938 There are others but it is the most famous and it was revolutionary when it came out. I think what GP means is that even a "compofiller", a demo that is not expected to win any prize requires some technical skill.