Left 4 Dead 2: Apparently I can consider myself a semi-professional now in that game, having beaten an Expert Realism The Parish... and I think I was stuck once, so I zoomed out of the game... zooming back, the infected did a decent job playing fair and restarting the chapter for me.
Once I thought... what title would Age of Empires have if it had cross-era gameplay, also adding a future, fantasy and sci-fi civs. And you would've been able to synergize real civ with fictional one. Then I thought of the title and similarity to a title - Age of Empires: Spectrum, with graphics, movement and physics of Age of Empires 3, but no limits on buildings except wonders. It could be just my wet dreams.