Portal 2 : World Record
8:56
Half Life : Alyx
3:54:12
Wolfram Physics Project: Relations to Category Theory
36:52
I Somehow Got a World Record Speedrun
10:53
Splinter Cell : The Twin Cells
43:08
Every Softlock in Portal
5:34
Cat Jumper 2000
22:40
Portal Developers React to Multiple Speedruns (Valve Software)
4:19