For those of you currently stuck indoors and looking for something fun to do, I'm happy to say that the excellent Tomb Raider reboot from 2013 is currently entirely free to grab. Simply head on over to Steam, click on the giant "Add to Account" button, and you'll be able to raid a surprisingly small amount of tombs in no time.
There is one catch, however, and that's the simple fact that Tomb Raider will only stay free until March 24th. That said, you'll still be able to play it afterwards, even if you didn't install it immediately, as long as you added it to your account. So if you're interested, make sure to do it sooner rather than later, lest you forget.
As for whether Tomb Raider is actually worth the trouble, I'd say the answer is yes. I won't pretend Tomb Raider is anything truly revolutionary, but what it does offer is some lovely environments to climb all over, a solid story that should keep you engaged all the way through to the end, as well as some pretty fun combat, especially if you're a fan of using bows. And for the low price of 'entirely free', I'd say that's a pretty good deal!
Have fun, and I'll leave you with one of the trailers, just so you know what you're getting yourself into.