This is a video of me, Tasselfoot, beating Tactical Assassin 3 Substratum with 0 deaths, 0 failures, and all 8 easter eggs. Also, 0 misses. Final time was 2694. Final score: 15094. My best time with all 8 easter eggs was 2712, so at least another 18 points are doable. I was a little bit slow on level 8, which is by far my hardest sniper level.
Music is Gone Shootin' by AC/DC