Here's a breakdown:
* Tomb Raider: Underworld (2008) was the last main game in the classic Tomb Raider series by Crystal Dynamics.
* Tomb Raider: Underworld - Beneath the Ashes (2009) was a downloadable expansion pack for *Underworld*.
* Lara Croft and the Guardian of Light (2010) and Lara Croft and the Temple of Osiris (2014) were spin-offs with a more arcade-style gameplay.
The reboot of the franchise started with Tomb Raider (2013), followed by Rise of the Tomb Raider (2015) and Shadow of the Tomb Raider (2018).
There have been rumors and speculations about a new Tomb Raider game, but nothing official has been announced yet.