To climb a ladder in "Grand Theft Auto 4," walk up to any ladder and press the correct action button for your console. There are different buttons for each: Y (yellow) for Xbox, triangle (green) for PS3, and F for PC. Move up or down to climb.
- Find the ladder
Walk up to the ladder, and stand as close as possible to it.
- Mount the ladder
Make sure you are standing directly in front of the ladder, and press the respective console controller's action button.
- Climb the ladder
Use the joystick or keys to move up or down the ladder.