Me versus three AI TEC Loyalist players, each in their own separate star system. I am in a star system with one of them, playing as TEC Rebels. I quickly tech up to the Rebel special technology that signs a peace treaty with all the pirates and neutral 'empires' on the map. In all actuality, it just let's me perform a colony blitz, and each one comes with a premade defense force that costs me no population. I snag half the system in a short time, bringing together a moderate sized fleet and fighting the Trade Coalition, who was my current foe, back to their own doorstep. Then I created the Ragnarov Titan and moved in, taking their Capital planet and quickly steamrolling their remaining forces until only their flagship remains, desperately fleeing system to system, but I own everything, and what I don't own, I hunt after him into. Finally I destroy him, taking one player out of the game.
An experimental weapons activation has been detected on an unexplored world! x6
Oh shit. The TEC get the Novalith Cannon, which completely depopulates planets it is fired at. I rapidly begin building emergency shelters and planetary shields, so I only lose one or two planets to the barrage. I begin building my own Novaliths (regrettably only two at this time) and firing back.
Good god, the mental image of solar systems exchanging broadsides like sailing ships is freaking AWESOME.
Sins of a Solar Empire: Rebellion (And all the various other DLCs)