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.
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
HDE PlayStation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers - Walmart.com
Mcbazel PlayStation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controller - Walmart.com
Amazon.com: Xahpower PS2 Controller to USB Adapter Converter Cable, Compatible with Sony PS1/PS2 Controller Gamepad to PS3/PC Controller : Video Games
Amazon.com: OSTENT PS1 PS2 to PC Computer USB 2.0 Controller Adapter Converter for Sony PS2 Wired Controller : Video Games
For PS2 to PS3 Controller Adapter PlayStation 2 to USB Cable for PC PlaySta~$j | eBay
PS3 controller connected to Playstation 2 slim modded device - YouTube
USB Port Game Controller Converter P2 to P3 Adapter Cable Without Driver Gamepad for PS2 PS3/PC System - Walmart.com
For PS2 to PS3 Controller Adapters PlayStation 2 to USB Cable for PC PlayStat YZ | eBay
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
Usb Controller Gamepad Adapter Converter Cable | Ps1/ps2 Dualshock Joypad Gamepad - Cables - Aliexpress
HDE PlayStation 2 Controller to USB Adapter for PC or Playstation 3 Converter Cable for Sony DualShock PS2 PS3 Controllers - Walmart.com
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
Brook Adapter for PS2 to PS3/PS4/PC Game Controller Super Converter US – Flashback Limited - Repair, Replay, Relive
How to Charge a PS3 Controller: 10 Steps (with Pictures) - wikiHow
Wireless Playstation 2 Controller Black - TTX Tech – Game On Games
For Ps2/3 Gamepad Durable Pro Pc Usb Ps2 To Ps3 Pc Usb Games Controller Adapters Converter Without Driver - Usb Receiver Adapter - AliExpress
Amazon.com: BROOK Switch Pro/Xbox One/PS3/PS4/PS5 to PS Classic/PS2 Super Converter : Video Games
How to use a Playstation 2 controller on a Playstation 3 - Quora
Usb Port Game Controller Converter P2 To P3 Adapter Cable Without Driver Gamepad For Ps2 Ps3/pc System 2-pack - Data Cables - AliExpress
Ps2 to Ps3 - Controller Adapter (Use Ps2 Controller on Ps3) Brand New – vandalsgaming
Amazon.com: OSTENT PS2 to PS3 USB Controller Converter Cable Adapter for Sony PS3 Console Game : Video Games
Wireless Vibrator 2.4G USB Game Controller Gamepad Joystick for PS2 for PS3 PC for Android - Walmart.com
PS2 Controller to PS3/PC Cable Converter
