Like many maps, Overpass is often considered to favor the Counter-Terrorists. It has a complex layout that emphasizes the importance of accurate callouts, which means that it is essential that you have a good understanding of the map’s various features.
It’s also worth noting that the map and callouts remain consistent (or very similar) in both CS2 and CS:GO.
From the bomb sites to the tunnels and more, here are all the callouts you need to know on the overpass interactive map.