Controllers with four buttons are probably retro controllers—or modern controllers that are trying to distinguish themselves.
The NEOGEO AES+ Arcade Stick brings back the iconic design—in black or white—and allows you to connect to the AES+ (or AES) wirelessly.
The FightBox R10-Twin-American allows you to play your favorite arena shooters with quality Happ joysticks and buttons.
Sanwa joysticks and Baolian buttons define the FightBox R10-Twin experience that may level up your skills at arena shooters (or pinball).
RetroGameBoyz makes retro game controllers, including arcade sticks, which can also be used for modern fighting games.
The R4's slanted layout has Sanwa buttons, and its Sanwa joystick can have a Sanwa bat or ball top. The R3 and R2 editions have less buttons.
This dynamite of an artisan arcade stick has been in the making for 20 years and features Seimitsu parts backed by a Daemonbite encoder.