Tortoise

Tortoise is an achievement/trophy in Metro Last Light and Metro Last Light Redux.

Overview
This achievement is awarded for making 10 spiderbugs flip over onto their backs, by concentrating the flashlight on them for a few moments. They must be killed for it to count - to save ammunition, simply keep the flashlight trained on them and they will burn and die, or you can approach them and use the knife attack to kill them. The first spiderbugs are found on the level Torchlight, but there are not usually enough to unlock this. More spiderbugs are found later on in the game.

Trivia

 * The achievement/trophy icon shows a male Spiderbug with its characteristic scorpion-like tail.