New feature: add games to your ignorelist and hide them!

Steam now has a feature that lets you manually hide games you own

How to Hide Games in Steam Library

How To Hide Or Remove Games From Your Steam Library

Peekaboo: Hide and Seek

Steam users beware! Bad guys hide malware inside fake game demos

Good news Steam weirdos, Valve may soon let you hide your dodgy

How to Hide Game Activity on Steam (Ultimate Guide) - MiniTool Partition Wizard

Steam might let you hide those embarrassing games in your profile soon

A private feature to hide individual games you're playing on Steam from your friends will be coming soon - GIGAZINE

How to Hide Your Gameplay Activity in Steam Profile and Chat