Lara Croft and the Temple of Osiris

In order to get this Achievement you will first need to unlock the Tomb by collecting the pieces and you've turned night to day.

The Challenges are

- Defeat Khepri in under 5:00
- Dodge all falling Meteors
- Dodge all of the Lava fissures on Khepri's ball

This can all be done in 1 go but if need be take as many times as you like.

The Shotgun is a great weapon to beat Khepri because it does alot of damage early on.
You want to start by bombing he's hands and then pumping shots into him when the yellow part is exposed before returning to he's hands.
Avoid the fissures which are glowing circles on the Meteor.
The Meteors themselves appear in the second part of the fight and are easily avoided by just stepping backwards.

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 is for getting all of the Tomb of Khepri challenges, which is the easiest one in the game to do all of the challenges, including the speedrun, in one playthrough. This is accomplished in the video.


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

Challenges: Defeat Khepri in under 5:00; Dodge all falling meteors; Dodge all of the lava fissures on Khepri’s ball

Khepri’s tomb is accessible after you’ve completed the Tomb of the Silversmith, and is required for its piece of Osiris to complete the main story. I don’t know if the game specifically directs you here later on, but I wandered over to it at this point so I’m placing it here as the earliest opportunity, as far as I know, to complete it. There are only three challenges for this, as it is essentially just a boss fight rather than a fully-fledged tomb.

You should have found an assault rifle by now in one of the first couple of tombs, and it makes quick work of him. The falling meteors will make an orange circle showing their impact, so make sure not to be standing near them when they fall. Lava fissures are the circular pits of fire on the ball. If you get damaged by a fissure or meteor, just pause and restart the tomb. To open his weak spot, place a bomb by one of his claws and detonate it, then unload on his chest with your rifle. The fight has three phases, with scarabs showing up part way through to add to the chaos, but it’s a relatively simple fight. If you’re using the assault rifle on his weak spot you should finish the fight in under 5:00 easily, and assuming you got the other two challenges you will net both of his achievements in one go.