If you're looking for something to pass the time while we're still stuck in the "your brain will freeze if you go outside" weather, you might want to check out February's Humble Monthly bundle. For $12 it offers the excellent Vermintide 2, the incredibly cheesy Earth Defense Force 4.1, as well as the surprisingly captivating Cultist Simulator. And as an additional bonus, once the next month rolls around you'll get a couple of extra games as well.
As you might imagine given my review of Vermintide 2, I would highly, highly recommend you pick up this bundle. Both Vermintide 2 and Cultist Simulator are brilliant games in their own right, while Earth Defense Force 4.1 is somewhat niche, albeit still rather entertaining if you're willing to turn off your brain and just enjoy the mindless shooty action. I think Verminitide 2 alone is worth the $12, so if you're even remotely interested, make sure to give the bundle a closer look.
Before you do, it is worth mentioning that the Humble Monthly is exactly what it says on the tin - a monthly subscription service. As such, if you're only interested in February's bundle and don't particularly care about what comes next, make sure to unsubscribe as soon as you can. You'll still get all of the bonus games at the end of the month, so you might as well play it safe and do it while you still remember.
And as a final note, allow me to leave you with one of the trailers for Vermintide 2. Have fun smacking ratmen around!