A small easter egg I just noticed: This television in Sgail briefly displays "Kill Everyone Challenge" in its bottom right corner in the style of bigMooney06's thumbnails for the eponymous videos. :
When you play HITMAN games do you kill everyone, or just the target? - Quora
When you play HITMAN games do you kill everyone, or just the target? - Quora
Achievements and Trophies in Hitman Absolution - Hitman: Absolution Game Guide | gamepressure.com
Hitman Absolution Kills Montage - YouTube
GameSpy: Hitman: Absolution Review - Page 1
Hitman Absolution - Killing Saints - YouTube
My kill everyone challenge in Marrakesh. Anyone got a higher killcount? : r/ HiTMAN
5: Hunter and Hunted - Hitman: Absolution silent assassin rank guide - how to stealthily eliminate all of your targets | GamesRadar+
Hitman: Absolution: All Melee Kill Animations (w/ Timestamps) - YouTube
Hitman: Absolution PC review - DarkZero
Snapping necks and killing crooked cops in 'Hitman: Absolution's' 'Contracts' mode - Polygon
Hitman: Absolution — Level 3 (Run For Your Life) — Kill Everyone Challenge - YouTube