XCOM 2 supports the Steam Controller, and no other gamepad - Polygon
Steam Controller Gets VR Support, More Compatibility | PCMag
Firaxis Details XCOM 2's PC Exclusivity - GameRevolution
Feral Support | GRID™ Autosport FAQs | Can I play GRID™ Autosport with a gamepad?
Play with 360 Gamepad at XCOM2 Nexus - Mods and Community
PC Controller, BIGBIG WON Rainbow Lite Wired Gaming Controllers for PC RGB Light, Custom Buttons, Macro, Turbo, Dual Shock Controller for Switch/Win10&11 Controller for PS4 via R90 PC Game Controllers
XCOM 2 supports Valve's Steam Controller but not traditional gamepads | Ars Technica
XCOM 2 Dev Most Comfortable With PC, Gamepad Support Coming Post-Launch
XCOM 2: Gamepad-Support mit neuem PC-Patch
XCOM 2 adds controller support on PC - Expansive
XCOM 2 natively supports Steam Controller | VG247
Controller Support with XCom-1-EU Controlls - XPADDER-Profil and GameConfigs - Recent Patch Compatible at XCOM2 Nexus - Mods and Community
Seems like this wasn't announced anywhere, XCOM 2 has native Steam Controller support! : r/Xcom
You can now play XCOM 2 on PC with a controller, and explore the Avenger in first-person | VG247