This thread sounds pretty good, I’ll add to it;
Nationality - American, British, German, French, Scottish, etc. Get starting items related to nationality (Germans get beer, Frenchies get baguettes French maid hats, Scotsmen get a bagpipe and a kilt, Norwegians start with viking stuff, etc.)
Bear traps - Bear traps instakill bears and do nothing to anything else.
Island fortresses - A castle marked with a grey F and surrounded by water. The perimeter is surrounded by landmines. The inside has a few dozen NPCs with 10 in every skill, armed with assault rifles with bayonets who will try to kill you as soon as you step onto their island. You can only reach it by swimming over the water. As soon as you kill the last NPC in the fortress, the whole thing explodes with mini nuke strength, instakilling you. 
So basically the whole thing is a booby trap.
Soviet Union anthem - Adding it to the mp3 player. It makes you feel great. If you play it on a stereo system, all banks in the reality bubble will explode.
Atatatatatatatata - a new martial arts move that lets you do really, really quick punches which do 1 damage. And after a while the victims will explode and die.
Paper planes - make them out of paper, how far you can throw them depends on your fabrication (how well it was made) and throwing (how good you are at throwing) skills.
A way for illiterate survivors to learn how to read - How about an ABC book? Find them at schools.
Tooth fairy - When you get hit hard in the head, teeth can come out. If you lose all of your teeth, you can’t eat hard foods anymore and you ushpeak wike bhis. You can put a tooth under a pillow, and the next day, you get a gift. Say, a suit of ornamental plate armour. Or a metal tank (200L). If you wake up in the middle of your sleep, you can catch the tooth fairy and steal anything of your choice, anything from a rag to zombie pheromones. But if you do that, she won’t give you anything for teeth later on.
Hallelujah - when the rng gods bless you with the opportunity to pass a check that had less than 50% chance of success, the message log is filled with “Hallelujah!”
Slapping - New attack that stuns victims for 10 turns but does 0-2 damage.
Divide and conquer - Decapitating enemies. Will stop zombie revivification and when the head rots, it turns into a skull, which you can use to study anatomy (first aid).
Tree climbing - makes you invulnerable to attacks from enemies on land. But if you are carrying too much weight, you can fall and break a random part of your body. If the torso or head is selected, you break your spine and your neck respectively, instakilling you. If it targets a limb, it instantly goes to -----
Poison dagger - Putting poison on a dagger and when you hit an enemy, it slowly dies.
Duels - when you insult an NPC (or the other way around) a duel can be initiated. You fight with fencing style and a fencing-compatible weapon to the death. There can also be:
Western duels - when you insult an NPC (or the other way around) a Western duel can be initiated. You start with revolvers in holsters, and as soon as one pulls out a revolver, they can start shooting. Last man standing wins.
Chess duels - when you challenge an NPC to a chess duel (or the other way around), if they accept, a chess match starts. You actually get to play chess and the challenger plays white. Their moves are decided by their intelligence level. If they have 4 intelligence, they will be stupid (simulated by making random moves) and if they have 20 intelligence, they play like a grandmaster (level 10 chess ai). When you checkmate the opponent, you win.
