Poisoning is one of the oldest murder tactics in the books. It was the old equalizer, and while it’s often associated with women, historically men are no less likely to poison you. This is not a guide on how to poison people, you banana bunches, it’s a guide on writing about poisons in fiction so you don’t end up on a watch list while researching them. I’ve taken that hit for you. You’re welcome. These are just a few of the more classic ones.

Hemlock: Hemlock (conium maculatum) is one of the more famous ones, used in ancient times most notably in Socrates’ forced suicide execution. So it goes. The plant has bunches of small, white flowers, and can grow up to ten feet tall. It’s a rather panicky way to die, although it wouldn’t show: hemlock is a paralytic, so the cause of death is most often asphyxiation due to respiratory paralysis, although the mind remains unaffected and aware.

Belladonna: Atropa belladonna is also called deadly nightshade. It has pretty, trumpet-shaped purple flowers and dark, shiny berries that actually look really delicious which is ironic since it’s the most toxic part of the plant. The entire plant is poisonous, mind you, but the berries are the most. One of the most potent poisons in its hemisphere, it was used as a beauty treatment, so the story says, and rubbed into the eyes to make the eyes dilate and the cheeks flush. Hench the name beautiful lady. The death is more lethargic than hemlock, although its symptoms are worse: dilated pupils, sensitivity to light, blurred vision, tachycardia, loss of balance, staggering, headache, rash, flushing, severely dry mouth and throat, slurred speech, urinary retention, constipation, confusion, hallucinations, delirium, and convulsions. It’s toxic to animals, but cattle and rabbits can eat it just fine, for some reason. 

Arsenic: Arsenic comes from a metalloid and not a plant, unlike the others here, but it’s easily the most famous and is still used today. Instead of being distilled from a plant, chunks of arsenic are dug up or mined. It was once used as a treatment for STDs, and also for pest control and blacksmithing, which was how many poisoners got access to it. It was popular in the middle ages because it looked like a cholera death, due to acute symptoms including stomach cramps, diarrhea, confusion, convulsions, vomiting, and death. Slow poisoning looked more like a heart attack. The Italians famously claimed that a little arsenic improved the taste of wine.

Strychnine: Strychnine (strick-nine) is made from the seed of strychnos nux vomica and causes poisoning which results in muscular convulsions and eventually death through asphyxia. Convulsions appear after inhalation or injection—very quickly, within minutes—and take somewhat longer to manifest after ingestion, around approximately 15 minutes. With a very high dose, brain death can occur in 15 to 30 minutes. If a lower dose is ingested, other symptoms begin to develop, including seizures, cramping, stiffness, hypervigilance, and agitation. Seizures caused by strychnine poisoning can start as early as 15 minutes after exposure and last 12 – 24 hours. They are often triggered by sights, sounds, or touch and can cause other adverse symptoms, including overheating, kidney failure, metabolic and respiratory acidosis. During seizures, abnormal dilation, protrusion of the eyes, and involuntary eye movements may occur. It is also slightly hallucinogenic and is sometimes used to cut narcotics. It also notably has no antidote. In low doses, some use it as a performance enhancer.

Curare: Chondrodendron tomentosum is lesser known than its famous cousins, but kills in a very similar way to hemlock. It is slow and terrible, as the victim is aware and the heart may beat for many minutes after the rest of the body is paralyzed. If artificial respiration is given until the poison subsides, the victim will survive.

Wolfsbane: Aconitum has several names; Monkshood, aconite, Queen of Poisons, women’s bane, devil’s helmet) and is a pretty, purple plant with gourd-shaped flowers. The root is the most potent for distillation. Marked symptoms may appear almost immediately, usually not later than one hour, and with large doses death is near instantaneous. Death usually occurs within two to six hours in fatal poisoning. The initial signs are gastrointestinal including nausea, vomiting, and diarrhea. This is followed by a sensation of burning, tingling, and numbness in the mouth and face, and of burning in the abdomen. In severe poisonings pronounced motor weakness occurs and sensations of tingling and numbness spread to the limbs. The plant should be handled with gloves, as the poison can seep into the skin.

I made these as a way to compile all the geographical vocabulary that I thought was useful and interesting for writers. Some descriptors share categories, and some are simplified, but for the most part everything is in its proper place. Not all the words are as useable as others, and some might take tricky wording to pull off, but I hope these prove useful to all you writers out there!

there are a lot of fun ones listed here and here but for the most part, they were made years ago and are now a dying breed. i get why. there's no money in it. factoring in the cost of web hosting and servers, it probably costs money. it's just sad that it's a dying art form.

anyway, here's some of my favorite browser-based interactive projects and games, if you're into that kind of thing. 90% of them are on the lists that i linked above.

A Better World - create an alternate history timeline

Alter Ego - abandonware birth-to-death life simulator game

Seedship - text-based game about colonizing a new planet

Sandboxels or ThisIsSand - free-falling sand physics games

Little Alchemy 2 - combine various elements to make new ones

Infinite Craft - kind of the same as Little Alchemy

ZenGM - simulate sports

Tamajoji - browser-based tamagotchi

IFDB - interactive fiction database (text adventure games)

Written Realms - more text adventure games with a user interface

The Cafe & Diner - mystery game

The New Campaign Trail - US presidential campaign game

Money Simulator - simulate financial decisions

Genesis - text-based adventure/fantasy game

Level 13 - text-based science fiction adventure game

Miniconomy - player driven economy game

Checkbox Olympics - games involving clicking checkboxes

BrantSteele.net - game show and Hunger Games simulators

Murder Games - fight to the death simulator by Orteil

Cookie Clicker - different but felt weird not including it. by Orteil.

anyway, here's all of the recommendations from the reblogs. not all of them are text-based, but it's a great mixture of styles. also don't forget the links in the second paragraph of the OP which will take you to FMHY where there are a bunch more games listed.

Games

A Dark Room - text-based science fiction role-playing game.

corru.observer - science fiction adventure web game.

Improbable Island - old-school text adventure game.

Candy Box 2 - incremental clicker game that evolves into RPG.

Arcanum - open source wizard clicker game.

sandspiel, Powder Game, Powder Game 2, The Powder Toy - more sand physics games.

Orb.Farm - fishtank simulator.

Façade - experimental game with a real-time interactive narrative where you try to fix a failing marriage.

The Catacombs of Solaris - trippy art game.

Yume Nikki Online - online version of the surreal classic plus fangames.

The Barncle Goose Experiment - combine element/alchemy game based on antique theories of abiogenesis.

Fallen London - free-to-play text-based open world RPG.

Nested - very unique text-based universe expanding game. described as possibly @orteil42's favorite thing he's ever made.

The Process of Elimination - interactive web novel (by @hypertextdog)

Discworld MUD - multiplayer, text-based, online game (a MUD, or text MMORPG) based on the Discworld books.

Horse Master - surreal text game about training a horse.

EYEZMAZE - flash (RIP) or HTML5-based puzzle games.

You Are Jeff Bezos - text game. spend Jeff Bezos' fortune.

The Password Game - challenging puzzle game where you have to meet password requirements (by neal)

Universal Paperclips - incremental paperclip making game.

Half-Earth - planetary disaster planning game where you try to save the world using socialism.

ChooseYourStory - community-driven website centered on CYOA style story games.

PhD Simulator - random event based text game. make your choice each month and see if you can graduate on time.

Dungeon Crawl Stone Soup - open source roguelike.

Cataclysm: Dark Days Ahead - turn-based survival roguelike set in the modern day.

Nethack - open source roguelike originally released in 1987.

FarmRPG - simple, mobile-friendly, text-based farming RPG.

Kingdom of Loathing - browser-based community MMORPG.

PokeRogue - browser-based Pokemon roguelike

Tools

Text Game Builder - works in your browser, with just a little bit of Python (by @grumpygandalf)

Twine - great (free!) tool for making text-based games quickly.

Ink - scripting language for interactive fiction (also free)

Flashpoint Archive - a community effort to preserve games and animations from the web.

PICO-8 - fantasy console for making, sharing and playing tiny games and other computer programs.

Non-Games

Library of Babel - interactive illustration which attempts to simulate what it might be like to browse The Library of Babel.

Superbad - technically not a game, sprawling website full of secrets.

17776 - serialized speculative fiction multimedia narrative about football in the far-future. beautiful, creative, legendary. created by Jon Bois, a legend and one of my favorite writers of all time.

Choice of Games - text-based, choose-your-own-adventure games (interactive fiction). some free-to-play, others can be bought like an ebook.

The Deep Sea - scroll to the bottom of the ocean. encounter the humble squid and his friends (by neal)

Space Elevator - like The Deep Sea, but up instead of down. you can equip your avatar with a scarf (by neal)

Internet Artifacts - an interactive history of the early internet (by neal)

If The Moon Were Only One Pixel - scroll through an accurately scaled model of the universe.

r/incremental_games - reddit community for incremental games.

r/WebGames - reddit community for web games in general.

The Castle of Otranto: A definitely real medieval manuscript about a very complicated inheritance crisis over a small region in Italy where in several people die, a priest shockingly has a son even though he's not supposed to, and a Santa Claus is watching from the background.

The Spider: A quirky girl causes a bunch of men commit suicide.

The Great God Pan: A quirky girl causes a bunch of men commit suicide.

Carmilla: A girl tries to create a lesbian polyamory via the only means that is obvious enough for the women she flirts with to pick up (because apparently kissing them and saying she loves them isn't), which is of course by slowly draining them of their blood so they may join her in undeath as vampires.

Olalla: A very horny, very racist Scottish guy really wants to have sex with every member of this noble family but specifically only wants to marry the one within whom the effects of inbreeding are least obvious.

The Jewel of the Seven Stars: A group of people have to deal the understandably angry ghost of an Egyptian Pharoah who is quite upset her body was stolen from it's tomb, all her stuff got taken away, and she got dragged to the hellhole that is London. Eventually her kidnapper feels a bit bad about this and decides to help her out.

Dracula: I mean everyone on the site has read this one.

Lair of the White Worm: The worst of Bram Stoker's longer form gothic works, but also the last. An Australian guy who is very excited to be there realizes that maybe England is a little haunted. Meanwhile he gets himself a wife with psychic powers, and plots against the Giant Snake who is planning to marry into wealth to escape her debts.

Phantom of the Opera: An incel decides to cause problems on purpose and also attempts desperately to woo a girl by threats of violence and his excellent singing skills. After finally managing to get her to promise to marry him by leveraging her boyfriend he realizes he's not ready for the commitment and dies. Also there's a guy called the Persian who is rad.