1. Launch the game "Sneak In 3D" on your mobile device to begin your stealthy adventure.

2. Use the on-screen joystick or directional buttons to move your character through the environment.

3. Navigate carefully through the bank, avoiding detection from guards positioned throughout the building.

4. Plan your approach wisely—some areas are heavily guarded and require timing and precision to sneak past.

5. Tap the attack button on the screen to silently take down guards when close enough.

6. Use your surroundings to hide and stay out of the guards' line of sight to avoid being caught.

7. If a guard spots you, act quickly—either engage in combat or escape to a safe spot.

8. Master your fighting skills to defeat guards efficiently and continue progressing through the levels.

9. Complete each level by eliminating guards and reaching the designated exit point.

10. If you are caught or fail a mission, use the restart button to try again from the beginning.

11. Practice makes perfect—improve your stealth tactics and timing to conquer each challenging level.

12. Advance through increasingly difficult stages, unlocking new abilities and improving your skills.

13. Keep an eye on your surroundings and remain alert—success depends on your ability to sneak and strike silently.