This brings back a lot of childhood memories. Age Of Empires 2 has been remastered in HD and released on Steam. It's essentially the same old Age Of Empires, but it supports higher screen resolutions, and they've redone a bunch of the effects. It also supports joining multiplayer games in Steam, Steam workshop, and achievements. I've been playing it a bit on my own and with some friends, and I must say it's just as fun as the original!
Grab it today for around 20 dollars on Steam. [Link]