Ms. Croft is grazed by a bullet while underwater. It has been scientifically proven that most bullets cannot penetrate water with lethal velocity.
Ms. Croft encounters wood structures and other objects like fabric sails and rope that are supposedly hundreds of years old. These objects would rot quite quickly in the damp environments Ms. Croft explores.
One of the modifications to shotguns allows for more shot to be loaded. Shotgun cartridges are of fixed capacity and shotguns can't usually add to the load.
At the end of the night-time oil refinery sequence, the camera pans up to see the moon at about 30 degrees above the horizon. The image of the moon is that as seen from the northern hemisphere. The game is set in the southern hemisphere so the image would be inverted.
Tracers can be seen hitting their targets after the actual round hits.
Firearm ammunition can be found in highly unlikely places such as the Godslayer cave.
Ms. Croft's disguise still has her flashlight on it, which would be a dead giveaway.
The beam cast by Ms. Croft's flashlight does not always follow where the flashlight faces.
Ms. Croft cuts ropes to disarm traps, and when she does the traps spring. Cutting the rope should prevent the traps from springing.
Some of the weapons can be upgraded with rifles barrels. Most guns already have rifled barrels.
When opening up a container containing new apparel, the audio is delayed by a few seconds.
Even though Cualli was caught for stealing herbs, the herbs that he stole are still on him when Ms. Croft frees him.
Ms. Croft notes that she is thousands of miles from Percy Fawcett's last known position, yet isn't surprised to see notebook entries from him.
Ms. Croft is told the name of Manko and then immediately mispronounces it.
When searching for Ms. Croft, an enemy NPC asks 'What if they're hiding?' even though they are only looking for her.