Time to build you own bundle and get access to a high discount, with the 2K Build Your Own Bundle Sale. With this special sale, each item is on sale by itself but if you buy 3-5 games you get an extra discount added at 3, 4 and 5.
Included in the sale for Linux:
- Borderlands: The Handsome Collection (might be cheaper on Steam even with the discount, although if you have the Humble Monthly the extra discount should make it cheaper than Steam)
- Sid Meier's Civilization: Beyond Earth
- Sid Meier's Civilization: Beyond Earth - Rising Tide
- XCOM: Enemy Unknown
- XCOM: Enemy Within
- BioShock Infinite
- Spec Ops: The Line
It's odd as Sid Meier’s Civilization VI and XCOM 2 along with their expansions are also on sale but not included in the bundle. Still good deals to know about though and worth checking on if you only want one or two games and not a bunch of them together.