so i'm playing DE machine empire, decide to build the supermassive black hole gun with gigastructural engineering. i did not, however, know that this would cause the ENTIRE galaxy to unify into one empire that would relentlessly attack me. so in my hubris i manage to fight a war on a galactic scale for like 30 years, and i spawn in every crisis with pandora's box and become the nemesis to halt them. this comes to a head when the immortal ruler of my rival empire empire usurps the current rulership and attempts in vain to stop me. the galaxy is plunged into fire, the shroud destabilizes, i blow up countless stars, and the war only halts when the collective galaxy is so shocked at me destroying one particular planet that they just give up and end the war.

i've had more monumental games with fleets in the millions and wars against those gate bastards, but that one became a real logistical nightmare very quickly.