Right-click on the game title in the library, choose properties. From the properties window there should be an updates tab and you can look at update history - although it's quite possible that won't show you what you want...
Scipii TWH Seraph
posted 09-06-13 12:48 PM
2 / 3
If in doubt validate the game cache via the properties menu. Though if you go to your Game's Library on Steam and switch the view to Downloads from All Games (or whatever you have it set to) it should list a of downloads, so one for Rome II should be in there, unless you've dismissed it already.