The best controller for steam deck is one you already have. My PS One Analog is still working, tho through cable with more than a decade old PS2 to PS3 USB converter.
PS2 to PS3 PC Game Controller Gamepad USB Adapter Converter
Amazon.com: Mcbazel Playstation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers (NOT Compatible with Dancing Mat Guitar Hero) : Video Games
TCOS Tech Micro USB Cable 0.5 m Dual USB Converter for PS2 Controller to PC and PS3 - TCOS Tech : Flipkart.com
Amazon.com: OSTENT USB 2.0 Controller Gamepad Joystick Adapter Converter Cable Cord for Sony PS1 PS2 Wired Controller to PC : Video Games
PS2 To PC USB Dual Playstation 2 Controller Converter Adapter To USB
PlayStation 2 joystick to USB | Dualshock 2 to USB | Use a PlayStation 2 controller on PC! - YouTube
Source for PS2 Gamepad Converter for PS2 Controller to PC USB Converter Adapter for PS2 Controller on m.alibaba.com
Xahpower USB Controller Adapter Converter Cable,Compatible with PS1/PS2 Controller Gamepad to PS3/PC Controller - Walmart.com
Playstation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers - Walmart.com
Joystick USB Dual Player Converter Adapter Cable For PS2 Gamepad Dual Playstation 2 PC USB Game Controller | Lazada PH
With CD Driver USB Splitter Cable Dual Pads Joypad Game Gamepads PC USB Game Controller PSX PS1 PS2 To USB Converter PS2 Wired Handle To PC Converter Adapter Cable PS2 Handle Converter
PS1 PS2 PSX Playstation Dual Joypad Game Controller to PC USB Converter Adapter | eBay
For Ps1 Ps2 Playstation 2 Joypad Gamepad To Ps3 Pc Adapter USB Games T1Q7 | eBay
Amazon.com: PS2 Controller to USB Adapter Converter Cable, Compatible with Sony PS1/PS2 Controller Gamepad to PS3/PC Controller : Video Games
USBtoPS/PS2 game pad converter - JC-PS101UBK
PS2 to PS3 PC Game Controller Gamepad USB Adapter Converter
Amazon.com: OSTENT PS1 PS2 to PC Computer USB 2.0 Controller Adapter Converter for Sony PS2 Wired Controller : Video Games
USB Port Game Controller Converter P2 to P3 Adapter Cable Without Driver Gamepad for PS2 PS3/PC System 2-Pack - AliExpress
NEW SALE! For PS2 Controller To For PS3 PC USB Adapter Converter Gamepad To Computer | Walmart Canada
Amazon.com: Mcbazel Playstation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers (NOT Compatible with Dancing Mat Guitar Hero) : Video Games
Amazon.com: Mcbazel Playstation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers (NOT Compatible with Dancing Mat Guitar Hero) : Video Games
Ps2 Controller To Usb 2.0 Games Controller Adapter Converter Cable, Compatible With Ps1 Ps2 Dual Shock 2 Joypad Gamepad To Ps Game - Temu
For Ps1 Ps2 Playstation 2 Joypad Gamepad To Ps3 Pc USB Adapter Controller G0K0 | eBay
