Nier Automata Sand Trials. There's actually one other final trial, its more or less a survival mode.Time Stamps:

Trials:
2:04 - Arena Rules
2:44 - Trial 1 (Lvl 25)
4:22 - Trial 2 (Lvl 35)
5:44 - Trial 3 (Lvl 50)
7:10 - Trial 4 (Lvl 60)
9:05 - Trial 5 (Lvl 70)
10:32 - Trial 6 (Lvl 80)

Dialogue:
1:02 - Speaking to Robots about some of the many rules
4:00 -  Why the Robots wear Masks (Façade)
5:28 - Why the Robots have rules
6:54 - How many Rules the Robots have
8:39 - History of Façade (Alpha Wolf)
10:10 - Why Rules exist

New Key Items:
11:50 - Final Rewards
13:08 - Destroyer Outfit with Long Hair
13:40 - Amazarashi Head (Pod Skin)
14:07 - Destroyer Outfit with Short Hair and Sand Mask

14:42 - New Novel Scene