Lara Croft and the Temple of Osiris

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 story-related, and will unlock after completing the Tomb of the Timekeeper for the first time.


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: Bronze/Silver/Gold – 75,000pts; Complete in under 7:00; Collect 5 Red Skulls; Kill 4 scarabs with a single bomb, Destroy Vases in the tomb, Complete the tomb without grabbing any time bombs

Play through your first time focusing on all challenges. Remember to restart the last checkpoint if you lose your multiplier. From the start, go down the ramp and around the corner to the left to find Red Skull #1/5. Use the grappling point with and swing to get it. Continue on until you have to move the first time bomb to the breakable wall. When moving these bombs, you can grab them with or just place your own bombs with and detonate them. Make sure to do the latter. DO NOT grab any of the time bombs, ever. Also, make sure to press to take out the staff and hold the ENTIRE TIME you’re moving the time bomb around with bombs of your own to slow down their fuse, otherwise they will blow up too soon.

This first one is easy, so practice your bomb skills moving it down to the lower level and release when it’s near the wall to break it open and continue. You’ll cross a bridge and have to pull a piston out of the wall to lower some spikes. Further along the path, you’ll reach the next time bomb. Use your own bombs to knock it up over the ledge that the piston is on near it (don’t waste time pulling the piston to drop the two sets of spikes). Remember to hold to slow it down, and use your bombs to blow it over to the first set of spikes you past. Go up the ramp to the right and drop down to the first piston. Pull it to drop the spikes and allow the bomb to roll down, then keep using your bombs to knock the time bomb up the next set of stairs and over to the breakable wall.

On the other side of the wall, rotate the piston to raise three wooden platforms. Jump across, and when you see the grappling point, use it to lower yourself down to Red Skull #2/5 CAREFULLY. Gain momentum swinging before releasing to reach the far side of the pit. When you reach the far side, head left first and up the ramp where the spiked balls came down to find Red Skull #3/5. Head to the right now and a short scene will show, after which tons of scarabs will show up. Place a bomb on the ground and lure them across before detonating it to get the 4 scarab kill challenge done. Pull the piston below to drop the spikes by the weapon above.

Quickly stand on the blue square, hold to raise it, and jump over to grab the weapon and hit the switch to drop the spikes on the right. You’ll have to grapple across another spike pit to the right, but be sure to swing left first and grab Red Skull #4/5 by standing to the far left on the lower wall before grappling up with . Continue into the next large room and circle up and around to the right to get down to where the next time bomb is. Press the switch on the ledge above, then use your bombs while holding to knock it up and move it to the left around the pit in the center, then up the stairs to the breakable wall.

In the next room you’ll have to act quickly shoot the eye on the left wall to raise the wooden platform by where the time bombs are coming out, then use to move the blue piston to push it down, then use your bombs to push it over to the breakable wall before the bridge falls out from under you. Once the wall breaks you’ll have to run up a long set of stairs, dodging falling boulders. Partway up, look for Read Skull #5/5 on a pillar and jump onto it from above, then run to the exit.

After the cut scene, you’ll be in the treasure room and will have the opportunity to open treasure chests ranging from 100gems to 1000gems to unlock. Assuming you have 100 gems (which you should easily have by now), go ahead and unlock at least one chest for the What’s in the box achievement if you haven’t done it already in the hub world. You’ll get Time keeps on ticking for finishing this tomb the first time.