Sometimes the best course of action is to not be seen or heard. Moving slowly, or staying in the shadows, will help you avoid enemy detection.

You are harder to see and hear while crouching. To crouch click [crouch]. Click [crouch] again to stand up.

Walking slowly or crouch-walking will make it less likely that your footsteps will be heard. When attempting to go unnoticed, avoid walking on stone or metal surfaces.

The Cloak and Move Silently biomods can also improve your stealth among organic enemies. Thermal Masking can make you invisible to bots and cameras.