Lara Croft and the Temple of Osiris

There are five challenge tombs in the game. The first one is very easy, I would say that it is almost impossible not to complete it. It opens up after you do the first tomb and get to the area where you can assemble the statue. The challenge tomb is on the right on the way to the next tomb, the game will point it out to you.

Just run through it , stepping on the four pressure plates and upen the gate at the end. The trick is to not step on a plate with a skull twice. Easy if you just plan your route a little bit.

I've created a two-part 100% walkthrough video. It covers every single achievement in the game except the co-op ones and the speedruns, but the co-op are self-explanatory and the speedruns are super easy once you've played a level, since you can usually just run past everything and solve the puzzles most of the time. Contrary to some reports, you CAN get the gold points challenge on EVERY tomb on your first time through in solo play. Follow along with the video below as you play through the game (and part 2) to have your 1k in 8-10 hours tops. A detailed text guide follows after the time stamps for those that prefer it, copied over from the walkthrough I've written for this game.

This achievement will come after your first challenge tomb, which takes place before the 3rd tomb you visit, the Tomb of the Silversmith, if following my guide.



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

You’ll pass right by a challenge tomb’s entrance on your right on the way to the Tomb of the Silversmith. This is our first challenge tomb, and is super easy. The rooms have skulls on the floor which release spikes when you walk on them. Just run across and hit the four pressure plates to drop the spikes in the path and continue. The next room is the same routine, just with some water you have to jump across. That’s it. Grab the upgrade and weapon to finish the tomb. How was that a challenge, exactly? You’ll unlock Up for a challenge if this was your first challenge tomb.