What's the code to get 30 lives in the original Contra?

Question

There was a code you entered into Contra for NES to get 30 extra lives. You entered it with the controller. What was it?

Answer 1

The Konami code:

up up down down left right left right b a start

or for 2-player

up up down down left right left right b a select start

(technically, the "start" and "select, start" are not part of the code, but are necessary to start the game)

Answer 2

The Konami code.

Answer 3

Technically the code is:

• up up down down left right left right b a

and select changed the mode to two players, and then start started the game, but the "[select] start" is generally referred as part of the code. This code is referred to as "The Konami Code", "The Contra Code", or simply "The Code"

Answer 4

The code (rendered in HTML) is:

↑↑↓↓←→←→ⒷⒶStart

Answer 5

Another representation of the code, which is responsible for me knowing it by heart without ever having played Contra: The Gothsicles - Konami Code IV