File:: Company.of.heroes.2.master.collection.v4....

Right-click the game in your Library > Properties > Updates (Build ID).

A single-player campaign featuring the US Armed Forces. File: Company.of.Heroes.2.Master.Collection.v4....

If you already have the game installed and want to verify your version: Look at the bottom corner of the main menu screen. Right-click the game in your Library > Properties