Interactive Fiction Jam from 10 a.m. to 11:55 p.m. Saturday and 10 a.m. to 5 p.m. Sunday at the Massachusetts Institute of Technology’s Building 32-155, also known as the Ray and Maria Stata Center, at 32 Vassar St. Free.

This game jam centered on interactive fiction is a great way to get started making narrative games or, if you’re active in the hobby, to push yourself to make a game in a weekend. The weekend starts with tutorials and workshops and leads to a Sunday session in which people play each other’s games. The theme of this event is “Honoring Our Ancestors” (in the sense of Bon, the Hungry Ghost Festival, Dia de los Muertos, Samhain, Hallowtide, Halloween and so on). Information is here.

Halloween events: “Tomes of Terror: Nevermore” radio play (from 5 to 7 p.m. Saturday at Responsible Grace Church, 204 Elm St., near Davis Square, Somerville, for $15, or $12 for students and seniors); The Armory of Horror haunted experience (from 6 to 10 p.m. Saturday and Sunday at The Center for Arts at the Armory, 191 Highland Ave., Somerville, for $20 for adults or $12 for kids); Monster Ball costumes ballroom dance (at 7:30 p.m. Saturday at the Massachusetts Institute of Technology’s Building 50, also known as the Walker Memorial, 142 Memorial Drive. Free for MIT students, $6 for other students; $8 MIT affiliates; $10 for others.

“Tomes of Terror: Nevermore” is The Post-Meridian Radio Players’ doing Edgar Allen Poe classics “The Raven” (of course), “The Masque of the Red Death,” “The Fall of the House of Usher” and “The Cask of Amontillado” in the style of golden-age radio – with actors in front of microphones and sound effects created live on stage. Creative and retro candies and sodas will be available. Information is here.

The Armory of Horror turns the main hall of the Armory into a haunted maze full of ghosts, ghouls and demons led by Matthew Martino, a local who has worked at scare shows such as Spookyworld, Castle of the Damned and Horrorville. Information is here.

But for a truly unique Halloween experience, throw on your costumes and go ballroom dancing at the Monster Ball with the MIT Ballroom Dance Team. There’s a 7:30 p.m. beginner dance lesson, with general dancing starting a half-hour later.

“Othello” from 8 to 11 p.m. Saturday and 4 to 7 p.m. Sunday at at the Sala de Puerto Rico in the Massachusetts Institute of Technology’s Stratton Student Center, 84 Massachusetts Ave. Tickets are $12 for general admission, $5 for students at MIT, Harvard and Wellesley, or $9 for other students and members of the MIT community.

The MIT Shakespeare Ensemble presents Shakespeare’s tragic study in love and hate, black and white and male and female – set by director Susanna Harris Noon in a “dark, sultry and gritty world” in which Othello is a black, champion female boxer who is also an outcast, censured for committing the taboo of marrying a young, white woman of a different class. Information is here.

Rockstar Halloween at 8:30 p.m. (doors are at 6 p.m.) Saturday at Johnny D’s, 17 Holland St., Davis Square, Somerville. Admission is $10 for this 21-plus show.

Yes, of course you can wear your Halloween costumes to this show, but the point is what the bands are masquerading as: Cheap Trickery as Cheap Trick; First Class Fool as Rod Stewart; and Pretendica as the Pretenders and Elastica. (Trivia: Members of Cheap Trickery also play in Pretendica. Bonus boast from Jay Gates, the Rod Stewart of First Class Fool: “Sure, every Rod Stewart impersonator has the haircut, shoes, and clothes … some even have the voice and moves. But in addition to all of that, Jay has something the other Rod Stewart lookalikes will never have. He’s got the nose … he’s got the nose! As Rod himself would sing, some guys have all the luck.” Information is here.

Halloween food: Once Muertos Day of the Dead Festival (from 6 to 1 a.m. Saturday for $40 and from noon to 4 p.m. Sunday for $25 at Cuisine en Locale, 156 Highland Ave., Somerville); Halloween Hangover Brunch (from 10 a.m. to 4 p.m. Sunday at Commonwealth Restaurant & Market, 11 Broad Canal Way, Kendall Square); and the 4th Annual Taza Chocolate Dia de Los Muertos (from 1 to 6 p.m. Sunday at Taza Chocolate Factory Store, 561 Windsor St., Somerville, for free).

The two-day Mexican Days of the Dead/Dias de los Muertos event at Cuisine en Locale with musical accompaniment by Walter Sickert & The Army of Broken Toys – and a full “Mass Mex” buffet Saturday or taco brunch Sunday – was written about here.

The Commonwealth brunch is based on the fact that whether it’s the alcohol or too much candy, Halloween can be too much of a good thing. So the restaurant has turned its Sunday brunch into a Halloween Hangover Brunch, with a themed menu that includes Fried Bat Wings, Monster Hash and a Spooky Bloody Mary (as well as $1 oysters, if that’s your idea of a cure). Stephanie Cmar, of Stacked Doughnuts, and Justin Burke-Samson, of Trademark Tarts, will be onsite frying and serving. “Costumes are not required but are welcome,” managers say, “as are exhausted adults and sugar-high-crashing children.”

The annual Taza event includes live music from Mariachi Veritas de Harvard; spins by DJs Dudley and Trizlam; a Slumbrew beer garden; food trucks including The Happy Taco, Taco Party and Roxy’s Grilled Cheese; treats from Party of Two, Fat Toad Farm and Vita Coco Coconut Water; and of course free samples of Taza Stone Ground Chocolate as well as sales of hot chocolate and other Taza stuff. Costumes are optional, but strongly encouraged (and there will be a face painter around for those who lack a costume and feel lame). Information is here; RSVP here.