Better With a Friend: Co-op Adventures
www.humblebundle.com
Get couch co-op games like Across the Obelisk and Risk of Rain Returns with the Better With a Friend Bundle–pay what you want and support charity!

$7:

Game Name Steam Link
Tribes of Midgard https://store.steampowered.com/app/858820/Tribes_of_Midgard
Cat Quest II https://store.steampowered.com/app/914710/Cat_Quest_II
For The King: Deluxe Edition https://store.steampowered.com/bundle/18267/

$10: All above, plus:

Game Name Steam Link
Risk of Rain Returns https://store.steampowered.com/app/1337520/Risk_of_Rain_Returns
Trine 4 https://store.steampowered.com/app/690640/Trine_4_The_Nightmare_Prince
Across the Obelisk https://store.steampowered.com/app/1385380/Across_the_Obelisk