Shadow of the Tomb Raider (SOTTR) is an action-adventure game released in 2018. and the Definitive Edition of the game was released in 2019 and includes all previously released content (weapons, outfits, skills and challenge tombs). The game is the last entry of the Survival Trilogy which started back in 2013. with Tomb Raider.

We follow Lara Croft three years after the story of Rise of the Tomb Raider (ROTTR) where she is trying to stop Trinity from taking the Dagger of Chak Chel before her. She managed to get it first, but she didn't know taking the Dagger would trigger the Cleansing, a Mayan apocalypse that ends in a permanent solar eclipse. To stop the apocalypse, she has to find the Silver Box of Ix Chel, but neither Lara nor Trinity (who soon takes over the Dagger from Lara) has it at that moment. So the larger part of the game will be her trying to find the Silver Box before Trinity and the culmination of the Cleansing.
When first starting the game, you will be prompted to choose the difficulty and unlike previous games, here according to your preferences, you can choose an overall difficulty option or separately choose Puzzle, Exploration and Combat difficulty. For those who want for example harder puzzles and easier enemies, you can choose that without any problem.
What you will also soon notice is that SOTTR survival elements aren't as important as stealth, which in ROTTR was the contrary. The resources aren't limited and at the end of the game, you will surely have at least one weapon in every category fully upgraded.
Also, as in previous games, you have additional optional and challenge tombs that most of the time have a gear requirement, but most of the tombs are now located in locations that you're going to revisit due to the main story and side missions that are given by mission givers. This in ROTTR was a small problem since I wanted to finish the tombs while I was exploring, but to be able to finish them, I needed a specific gear that I ended up getting after I had already left that location.
The core gameplay is similar to previous titles but also improved in every aspect. The story is also better than any other Tomb Raider game in my opinion. Both ROTTR and SOTTR has a great story, but I liked SOTTR's story a bit more.
You can buy weapons, resources, and both weapon and inventory upgrades with money found by looting enemies or exploring. The Peruvian landscape is beautiful and full of wonders to see, making this the best looking Tomb Raider game so far.

The additional seven challenge tombs which are included in the Definitive Edition of the game can be found in the Challenge Tombs section of the Main menu and in the game itself are found as side quests given by mission givers with a yellow circle in the lower right corner of the marker. These tombs and missions last longer and they are a little bit more difficult and unlike normal optional tombs, a loading screen is shown when entering the tomb. Also, when you finish the tomb there isn't a way out, but you'll be immediately taken back to the spot you were before entering the tomb. The tombs overall are great and offer additional hours while going through the main story.

All in all the best game in the Tomb Raider's Survival trilogy, offering a great story, great gameplay, great setting and graphics. Stealth is greatly improved, and it is probably the most important aspect of the game while tuning down the survival elements which aren't the main aspect as it was in ROTTR, which makes sense when taking in mind the locations where the story unfolds.