Half-Life 2, Portal and became available in Google Play
Alien Controller. image - SMOD Tactical Half-Life:Source for Half-Life 2 - Mod DB
Amazon.com: Game Controller Desktop Stand Holder (2 Pack) for Xbox ONE 360 Switch PS4 STEAM PC Nintendo, Universal Gamepad Accessories - No Screws, Stick on, Black by Brainwavz: Electronics
How to Play Half-life 1 and Half-life 2 in VR | TechRadar
Fully reworked Half-Life 2 configuration for the DualShock 4 : SteamController
Will Valve's Crazy 'Steam Controller' Reinvent the Gamepad? | WIRED
Rumor Control: Next-gen Xbox controllers and Xbox Half-Life 2's summertime blues - GameSpot