For those after some of the bigger Linux games, you should take a look at Humble Store's Square Enix Publisher Week.
- Deus Ex: Mankind Divided - 85% off
- Life Is Strange (the original) - Complete Season - 75% off
- Tomb Raider GOTY Edition - 75% off - The standard edition is also 75% off.
- Goetia - 75% off
- Rise of the Tomb Raider: 20 Year Celebration - 67% off
- Life Is Strange: Before The Storm Deluxe Edition - 40% off - Coming soon to Linux. For those iffy about it counting as a sale for Linux, Feral have previously stated in public it's fine to buy a title once they've confirmed it's coming (which they have). The standard edition is also 40% off.
There's a few more on sale too, like season passes, DLC and so on. Some absolutely great deals there, for some quality Linux gaming experiences. Full list here.
Ps. For those who like your comics, there's also the Humble Comics Bundle: Dungeons & Dragons 2018.