There are 4 humble bundle original games available for free, make sure you pick them up!
https://www.humblebundle.com/monthly/trove?linkID=&mcID=102:5afe24270fab4e4f3c105d98:ot:5a4eedebc438005fac4af3df:1&utm_source=Humble+Bundle+Newsletter&utm_medium=email&utm_campaign=2018_05_18_june2018_monthly_marketing2&linkID=&utm_content=hero_image
Note: There not steam games