Lara Croft and the Temple of Osiris - Full Walkthrough (all challenges)

I wanted to make a one-stop-shop for achievement hunters and completionists. I can't get my computer to compile all two hours into one 720p video, so I have two one-hour videos here that will take you through the entire game, showing how to get every challenge, including red skulls and gold points challenges, solo in a single run. Then all you will have left to do is the speedruns and co-op achievements. Enjoy!

Timestamps:
00:07 - Pyramid of Osiris
13:32 - Tomb of the Timekeeper
22:08 - Challenge Tomb #1
25:00 - Tomb of the Silversmith
35:42 - Challenge Tomb #2 (west/southwest from Tomb of the Silversmith)
37:55 - Khepri's Tomb
42:52 - Oracle of Osiris
46:50 - Challenge Tomb #3
49:50 - Tomb of the Ferryman
1:02:22 - Challenge Tomb #4