What is your highest number of deaths at once?

I created a big Frankenhousehold of the max 8 sims, put them all in their winter clothes, then sent them to my pauper's-grave lot in Oasis Springs on a scorching hot summer day. A little bit of "tell them all to cloudgaze then turn autonomy off temporarily" and an hour of game time later, and ol' Grim showed up, no doubt with the same look on his face under the hood that I get at an all-you-can-eat barbecue restaurant in the heart of the American South.

When Grim was done, I was like "don't go anywhere bud, there's more where that came from." I then dumped another 8 lucky contestants into the arena, same method, same result.

And then, for the pièce de résistance, I threw in another 4.

So total of 20 sims culled in one mass death event before I saved and went into Manage Worlds. This was fairly early in my current simworld after I bought this desktop computer; I had to clean house of the more bothersome NPCs.

Eight Sims died right outside the gym, just inches away from the front door. It happened right after Seasons was released and was the first time I'd played during the winter so the catastrophic event caught me off guard. Grimmy was beside himself as he reaped soul after soul while a horde of grieving Sims wept. My Sim had been directed to work out, so he walked past the crowd and went inside to complete his task and only as he left did he pause to grieve over the urns scattered around the entrance. The fact he didn't know any of the deceased didn't stop him from grieving for two days, though. I found that to be incredibly odd. But at that point I knew there must be a bug of some kind at work because I had many Sims die from exposure while jogging in the winter. Before I found a mod to fix the problem, I must have had at least twenty Sims die during blizzards because they just had to go jogging no matter what the weather was like. :/

I lost track, but it was eventful. I had a mod that let me be a supervillain. If anyone walked in places I walked, Sims burned to death. Grimmy literally walked the streets.

Not going back to that chaos...

Another game, I had a mod that allowed me to turn characters into zombies. I turned one into a zombie, and let him go. Later I find zombies in other worlds.

4 at once. But that was deliberate. I put in elder exhaustion for all of them. It was to have parents for a couple on their simology family tree. If I do that now, I just max out their age and let them died naturally of old age when it kicks in. Kind of nicer story-wise anyways because it gives some in-game interaction before they pass away 'naturally'.

4 Sims in the bar died from cardiac explosion after my vampire used his ability to cause burst of anger. That was the highest I have ever got and it was accidental, all were game created townies. From famous NPCs I had Landgraab senior froze to death in spa when he decided to meditate outside in freezing conditions.

It was 5 sims I believe but it could be more, I can't remember anymore, but it was cheated because of the unforgiving deathrolls. I let them die by the lightning bolt for reasons, but this method isn't recommend, at a second time I used that method my game crashed. The highest number without cheats was 4 at once. It was a group meeting in a heat wave and I had created a group outfit, bad mistake. I didn't know how I could change the outfits of the others and suddenly all other members were dead. That was the end of this settlement game. :(

I think I'm going to have to reboot. Midway through season 4 and they are still tuck at the lot

The most I've had die at once is 1

Wow I didn't know it's possible for Grim Reaper to reap more than one Sim at once.

I don't remember the exact number as it was more than a year ago. Must have been 7-9 people. All froze to death in a snow storm at Hare Square Park in Windenburg during a club function.