The adult classification is applied when the level of violence reaches a stage where it becomes a depiction of gross violence, apparently motiveless killing, or violence towards defenceless characters. The glamorisation of the use of illegal drugs and of the simulation of gambling, and explicit sexual activity should also fall into this age category. 

Aliens Colonial Marines

Aliens vs Predator 

Aliens Isolation

Arizona Sunshine

Assassin’s Creed: Odyssey

Assassin’s Creed: Origins

A Way Out

Back 4 Blood

Battlefield 4 

Battlefield Hardline 

Bioshock 

Blood & Truth

Borderlands 3 

Bulletstorm 

Call of Duty Advanced Warfare

Call of Duty: Black Ops 4

Call of Duty Warzone

Dead By Daylight

Dead Rising 2

Doom VFR - Disc

Fallout 4 

Far cry 2 

Far cry 3 

Far Cry 4 

Gears of War

Gears 5

God of War

The House of the Dead: Overkill 

Invasion

Medal of Honor Limited Edition 

Mortal Kombat 11 Ultimate

Ninja Gaiden 

Payday 2 

Red Dead Redemption 

Red Dead Redemption Undead Nightmares 

Resident Evil 7 Biohazard - Disc

Trek to Yomi

The Elder Scrolls 5: Skyrim

Until DawnRush of Blood 

Walking Dead Survival instinct 

Wolfenstein