Cheers!

Cheers! is a secret achievement/trophy in Metro Last Light Redux.

Overview
In order to receive this achievement, there are three occasions where the player must pay for a drink at the bars inside the metro station. Fortunately, all three locations take place at the same bar in the Venice level. Simply approach the bartender, pay for your drink and then take a swig. Repeat this two more times here and the achievement will finally unlock before Artyom blacks out.