Liberty City and Sin City let me tell you some secrets of Sin City. (with arrow keys)

Sin City:

← →, x, ↑, ↓, mouth, ←→

Obtain weapons 1

←→, mouth, write, △, ←→

Acquisition of weapons 2

←、→、△、↑、←、O、←、→

Acquisition of weapons 3

←, →, mouth, mouth, L 1, R 1

Armor 100

↑、↓、↓、→、O、O、L 1、R 1

Health 100

↑、↓、↓、→、X、X、L 1、R 1

Get 250 thousand dollars

Write →, mouth, mouth, left, left, o, o.

Raise the wanted level

↑、→、△、△、↓、←、X、X

Reduce the wanted level

↑，L 1，↓，R 1，↓，L 1，→，R 1

tank

Write, write, →, △, O, O, mouth

Cars avoid you.

L 1, R 1, R 1, ← →, mouth, ←, R 1

Destroy a car near you.

→, l 1, ↓, l 1, o, write, l 1, mouth

Can attract people

↓、↓、↑、L 1、R 1、△、O、X

No friction

←, ←, L 1, R 1, →, ←, →, and mouth

Weather: Dark clouds are gathering.

←、←、L 1、R 1、→、↑、←、△

Weather: It's raining.

↓、↑、→、△、L 1、△、L 1、△

lorry

R 1，L 1，L 1，↓，↑，X，↓, L 1

Accelerated clock

←、←、R 1、R 1、↑、△、↓、X

speed up

←、←、O、O、←、↑、△、X

Game deceleration

L 1，R 1，L 1，R 1，←，O，↑，X

Change the car color to black (except police cars)

→、↑、←、↓、△、△、L 1、R 1

Change the car color to color (including police cars)

→，→，O，O，L 1，R 1，↓，X

commit suicide

I hope it helps you.