Ultimate Epic Battle Simulator it could do some really cool things with thousands of soldiers / ducks / zombies on the battlefield at the same time, but your next sequence, of course, has only one place you can go to push the envelope.
Ultimate Epic Battle Simulator 2, due sometime in the fall for the PC, does all the things the original did, like a first-person mode and sandbox, but now there are also “story-based” campaigns and “infinite” army sizes (the first game is strongly recommended not to exceed 100,000).
The trailer below has more than that. That looks … tiring for a PC. And I know this is going to be pedantic, but although the trailer says “millions” in the title, it also says there are 1.3 million characters in the clip, which is not really “millions”, that’s “a million and change”. Still, it’s impressive!