This week's Epic Games Store freebies are excellent Halloween fare, but they couldn't be more different. Costume Quest and SOMA will both keep you company during the spookiest part of the year, one comforting you while the other tries to freak you out. 

Costume Quest is a Double Fine RPG set, conveniently, on Halloween, that pits costumed kids against monsters in turn-based scraps. The slightly rubbish costumes also transform into giant, real versions of what they're trying to depict, like a kid in a cardboard robot costume becoming a towering mecha. It's good fun and understands the value of candy.

There's no candy in SOMA. It's a survival horror game set in an underwater base where you're being stalked by grotesque mechanical monsters. These creatures are the source of many a jump scare, but at its heart SOMA is a psychological horror game about exploring the eerie environment. The monsters actually get in the way a bit, but thankfully modders, and eventually the developer, created a death-free safe mode.

Both games are free until November 7, followed by Nuclear Throne and Ruiner. 

The Milkman Conspiracy started, as many great things do, in a Thai restaurant. Or maybe it didn't. Tim Schafer can't remember exactly. Somebody—perhaps him—came up with the phrase 'I am the milkman, my milk is delicious', and it may or may not have been during a Double Fine team meal. "I wish someone had said it at the restaurant, because their milk was delicious," he says.

Either way, those eight words unified ideas that had been buzzing around his head for a conspiracy theory-themed Psychonauts level. It's how most levels for the zany platformer started: Schafer brought the concept, the artists re-imagined it, the designers dreamt up the gameplay, and then the world builders and programmers brought it to life. So how did The Milkman Conspiracy go from a simple, silly phrase to one of the most beloved levels in a beloved game?

How did The Milkman Conspiracy go from a simple, silly phrase to one of the most beloved levels in a beloved game?

Schafer has always been fascinated by people who genuinely believed conspiracy theories, and wanted to know what was going on inside their heads. "I loved the movie Capricorn One when I was a kid, on faking the moon landing. Just the idea that someone would think [it was true] was so funny to me, in the same way some people think flat earthers are funny now, but I find it very sad, because it's just a symptom of how scary and misleading the internet can be," he says.

He drew up a chart of conspiracies and linked them all to a central character, Boyd. Some of the theories were famous, or taken from movies. Some were inspired by office chats, others by a homeless man named Doug, who lived on the streets nearby. "We'd pay him $10 a week to sweep our driveway," Schafer says. "He had ups and downs. Certain days he thought the government was trying to do things with him, and some days he didn't. It was interesting to talk to him… trying to get inside of his head was very inspirational for the level. I still see him around the neighbourhood."

Psychonauts was an exercise in dealing with mental illness in a comic way—the team were conscious of never "punching down" and wanted players to empathise with the characters, Schafer says. For Boyd, that meant showing the problems he'd been wrestling with: Being fired from a string of jobs and having an alter-ego implanted in his mind by Psychonauts villain Oleander.

That alter-ego was, of course, the Milkman.

Visually, Schafer imagined Boyd's mind world as a giant spider's web, with Boyd's house at the centre. He also wanted it to give it a retro, '50s spy vibe, and thought a suburban neighborhood would be the perfect setting: Relatively mundane on the surface, but hiding a dark secret. He gave the concept to his artists. 

Art director Scott Campbell tells me he wanted to emphasise paranoia, and he drew eyes and binoculars popping out of trashcans, mailboxes and bushes to make the player feel like they were being watched. He also came up with the G-Men, who kept an eye out for suspicious activities. 

"I based their outfits on the classic '50s G-Men detectives in their overcoats and hats, reminiscent of the Spy vs Spy comics in Mad magazine and every single TV show from that time period," he says. "I just loved that spies always wore those overcoats and people were supposed to not notice them in hotel lobbies or on park benches with their newspapers covering their faces, with just their eyes showing."

Campbell says the team found it funny to simply give the G-Men a single object as a disguise, and have them act out what was clearly the wrong use for that object. It's why you see G-Men using red stop signs to hammer in imaginary nails, or playing a bouquet of flowers like a guitar, and it's the root of much of the level's humour. 

Schafer recalls the initial magic of the level coming from a drawing by concept artist Peter Chan. "Suburbia is supposed to look mundane, but what if it was all just vaulted up against the sky? He had this drawing of the roads bent and twisted in the air, like [Boyd's] thinking was twisting back on itself and illogical.

"And I was like, 'woah', the programmers were like, 'woah'."

Schafer knew instantly that was the road to pursue, but he still had no idea what the gameplay would look like, so he brought in lead designer Erik Robson. Up until that point in the game, the team hadn't used the player's inventory much, and Robson was keen on an adventure game-style level where players combined items in their inventories to solve puzzles.

Those puzzles would be themed around the G-Men guarding certain areas, and the players would have to carry the right item to blend in. It fit well with Clairvoyance, a psychic power that let protagonist Raz see through the eyes of other characters, which had come from Schafer's research into psychic abilities.

The trick, Robson tells me, was to make every possible item and Clairvoyance interaction entertaining, including failures. The team knew players would try to combine seemingly unconnected items, or try out their powers on inanimate objects, so they created a huge spreadsheet of every possible interaction, filling each box with a new idea.

"We know we have to have something fun for if I use the clairvoyance on the feather I'm holding, for example," he says, "We knew those interactions would all be possible… it ends up being a situation where a bunch of creative people have to brainstorm and come up with fun solutions, and hopefully, that ends up being entertaining for a player."

Sometimes those interactions would be simple: When used on a keypad, Raz is seen as a giant finger. But others would require more time and effort, and one of the brilliant things about Double Fine was that three designers were allowed to take three days to come up with the right concept.

All the things that seem like antagonists, in the level, are like an immune system trying to understand an alien body in its midst.

The Milkman Conspiracy ended up much larger than originally planned, partly because of the team's relative gravity tech. The programmers came up with a way to flip gravity as you moved between the twisted, spiralling streets that Chan had drawn, and the camera would react in kind. It worked brilliantly, and the level naturally expanded as Robson took players off in different directions.

The sprawling design also fit into the theme, he says. "Broadly, the goal of every Psychonauts mind level was to express the personality of the character in whatever way possible. I think there was something appealing about it being an open-air maze. That's a weird contradiction that seems consistent with Boyd: 'I'm lost, but I can see everything. I see my goals, but I can't suss out how I'm going to get there.'"

In the end, Robson feels Milkman sprawled too much. "There's maybe two or three of those ambient houses when there should really only be one. As a level designer, my proclivity is to make things too big, so there might be a bit of guilt kicking in there."

Robson also wishes the team could've better expressed Boyd's inner turmoil throughout the level. The opening sequence, where the player uses Clairvoyance on Boyd and sees the conspiratorial scrawls he's made on the walls of his house, is an example of when it worked, because it gave the player a sense of what was to come while revealing something about Boyd's character, Robson says.

"All the things that seem like antagonists, in the level, are… like an immune system trying to understand an alien body in its midst. And that alien body is the what the Milkman represents, this thing that is there and buried, but he can't get rid of, and he knows something bad is going to happen as a result. There are a bunch of things I think we did get, the sort of confusion and how nothing is quite what it seems, the open-air maze. But I think that would have been cool to kind of drive that emotional point home better."

Partly because of these niggles, Robson says he's never thought of Milkman as a standout level. But he says it's one of the funniest, and Schafer's writing undoubtedly brings the whole thing together. Simply written down, the jokes—"The most pleasant sewers can be found in Paris, France"—have almost zero impact. But their deadpan delivery works so well in the context of the level, and the ultra-serious G-Men talking about how "rhubarb is a controversial pie flavor" as they try hopelessly to blend in with their given roles proves to be hilarious.

That was only possible because writing all the dialogue came last. After the designers and gameplay programmers had finished, Schafer would assess every piece of the level, and write dialogue based on all the work that came before. "That was the most solid foundation for the jokes to get layered on top," Robson says. "Half of my memory of Milkman is playing it without any of that dialogue, so that stuff still almost feels like a sort of recent edition. And then after you're done with the level, six or eight weeks later, this dialogue appears all of a sudden in the game."

Schafer tells me he wanted Erik Wolpaw to write the dialogue, but Wolpaw ended up being too busy. "So I ended up writing all the G-Men dialogue myself and I'm so happy I did, because it was so fun," he says. "It's just that matter of fact, straight-laced: 'Who was the milkman? What was the purpose of the goggles?'

"We just happened to be talking about pie a lot, about people thinking rhubarb can be dangerous if you cook it wrong. You can poison people. So it's a very controversial variety of pie—being able to sneak stuff like that in was really fun. It was really relaxing to write in that flat tone. 'My helicopter goes up and down.'" 

It's those jokes that I, and many other players, remember best about The Milkman Conspiracy. But for Double Fine, it carries its own legacy: a reminder that "no one person makes a level", Schafer says. "I didn't think of the twisting roads, and I didn't think of the way the G-Men functioned. But I still feel like the ideas that I cared about are in there, and each department got to contribute an essential part of the level. Any one piece of that, you took it away, and it's not the same," he says.

The original Costume Quest is an underrated Double Fine classic, an homage to JRPGs dressed up for Halloween in which kids use the powers of their robot suits and unicorn outfits to fight monsters disguised as adults. (The sequel was less great.) Now Frederator Studios, the people behind Adventure Time and the Netflix Castlevania series, are turning it into a cartoon. 

The animated series will debut on Amazon's Prime Video service on March 8. The trailer makes it look a bit different conceptually to the games, with magical costumes coming from a mysterious shop rather than ordinary costumes being brought to life through the Power of Imagination alone. Also the monsters are powered up by nougat. 

As well as the trailer above, you can watch the opening titles below.

The Humble Store is holding a huge Double Fine sale today. The sale runs through 10 a.m. Pacific (1 p.m. Eastern) tomorrow, Thursday, January 25, and includes games that the studio both developed and published. You can find all the games in question by searching for Double Fine in the store, or by following this link. Here are some of the best games and discounts available:  

•  Everything - $8 at 50 percent off ($10 with the OST)  
•  Psychonauts - $2 at 85% off 
•  Day of the Tentacle Remastered - $5 at 67 percent off 
•  Grim Fandango Remastered - $4 at 75 percent off 
•  Full Throttle Remastered - $10 at 34 percent off
•  Broken Age - $5 at 75 percent off  
•  Escape Goat 2 - $4 at 60 percent off  

Some online stores give us a small cut if you buy something through one of our links. Read our affiliate policy for more info. 

It was a year ago, almost to the day, that Double Fine showed off some Psychonauts 2 "prototype gameplay" in a recreated version of the original game's summer camp. The elements on display "looked nice but weren’t designed to be part of the full game," the studio explained in a Fig update. "They were simple spaces that didn’t incorporate any of the tricky platforming and open exploration we want to be be central to Psychonauts 2." The new video released today, however, is much closer to what the final game will deliver. 

"The 'First Playable' is an area of the game that we’ve built to test our new pipelines and workflows across all departments—art, animation, tech, design, cinematics, etc," Double Fine wrote. "We’ve tested all of this a lot during pre-production, but this is our first big attempt to create a fully arted up, fully playable chunk of gameplay with all the systems, art, gameplay, and tech working in the same place." 

The segment is basically a "vertical slice," although the studio isn't using that term because it implies "a level of polish and completeness" that isn't currently there. But it's a fully playable area with "player movement, combat, quests, experience, UI all working together with scratch dialogue and audio, some rough visual effects, textures, lighting, even a cut-scene," which enables the studio to test and iterate on the systems—and show off what it's doing. 

There is, around the midpoint of the video, an unexpectedly up-close look at a goat butthole, and it's not entirely just a cheap joke: The Fig update also digs into "how a goat gets made," from simple sketches to more detailed drawings, a 3D model, texturing, and animation, which actually involved a real visit to a goat farm so the subtleties and nuances of goat movement could be properly captured.   

"It takes nine goats to the say the F-word," Double Fine boss Tim Schafer explained helpfully. "I've done a lot of goat porn. Graffiti. Goat porn graffiti." 

Double Fine is also "pretty close" to sharing details on backer rewards, which it expects will be shipped out in three batches: "One batch of stuff that doesn’t take too long to make (shirts for example), another batch of stuff for the more complex or custom things (like action figures) and a final batch for stuff that requires the game to be complete." Backer surveys should start arriving "really soon," it added. 

Psychonauts 2 is still far from a proper release date, but the last time we looked it had an "estimated delivery" window of summer 2018. More information about what's cooking is up at psychonauts.com. 

The Humble Store is giving away another old-time classic as part of its End of Summer Sale: Psychonauts, the Double Fine adventure-platformer about a kid with a cool hat who goes off to summer camp.   

I have mixed feelings about Psychonauts. I loved the writing, the voice acting, and the bizarre, beautiful game world that was filled with things to discover. But the platforming could be repetitive, and often outright infuriating. I never did finish it—I ran out of patience midway through the godawful Meat Circus, and decided I was close enough to the end to call it a day. 

I've never gone back, in part because I don't want to spoil the magic of the memories, but "free" is awfully tempting, and according to the Wiki the level has been made considerably easier in the Steam release. Which is what you'll get with this Humble freebie: Go here, add it to your cart, and after you check out you'll be emailed a Steam code.   

Since we're here, a few other Humble Store deals of note:

• Metro Redux bundle: $7.50
• Darkest Dungeon: $10
• The Talos Principle: $10
• Luftrausers: $2.50
• And one more, let's see... How about Shadow Warrior 2 Deluxe for $25 (the regular edition is on for $20, but the soundtrack alone is worth the extra fiver)

The Humble Store End of Summer Sale runs until 10 am PT on September 21, while Psychonauts will be free until the same time on September 16. 

Some online stores give us a small cut if you buy something through one of our links. Read our affiliate policy for more info.

Following the recent announcement of a crowdfunding campaign for Psychonauts 2, Double Fine and 2 Player Productions put out a three-part documentary about the origins of the original game. It s a lovely, candid look at how Tim Schafer and co. scraped together their first platformer without much of a clue how to pull it off. I ve yet to watch part three which just came out, but based on the previous installments it will be a fascinating combination of old footage from the game's development, other stuff from Double Fine s early years, and some hokey Tim-Schaferisms.

Rarely does the public get quite this sort of inside look at game development, particularly these days. A particular note of interest: Psychonauts was actually cancelled after leadership roles shifted at Microsoft, and some of their feedback said that the game might be too funny for a wide audience. Luckily, Double Fine finally secured a deal with Majesco to publish.

Watch the Psychonauts Retrospective: The Color of the Sky in Your World, parts 2 and 3 below.

Psychonauts 2 was announced at The Game Awards today, albeit in a roundabout way. It's not officially guaranteed to happen yet, with a $3,300,000 crowdfunding campaign underway on Fig. But Fig will only provide one portion of the development funds. Double Fine will be providing a big portion of the funds themselves and an unnamed outside partner will be providing the remainder. 

The campaign page is live now, and is ticking up at a pretty quick rate. Rewards are doled out in tiers, similar to Kickstarter, and you can pick up the game, once/if it's completed, for $33 bucks. Donate enough to be an official investor, and you can pick up a piece of the profits.

Be sure to watch The PC Gamer Show next Tuesday, as we'll be talking to Tim Schafer himself. Join us as we try to take a peek into the industry veteran's mind about Double Fine's surprising endeavor. 

Watch the pitch video below.

Nothing says “indie” quite like breaking down the walls of copyright and adding a bunch of characters from games you had no hand in making. And wouldn’t you know it, Gaijin Games is doing just that with their cardiovascular improvement simulator, BIT.TRIP Presents: Runner2: Future Legend of Rhythm Alien or "Runner 2" for those who need to work on their lung capacity.

Those who drop $3 for the “Good Friends Character Pack” will have access to Psychonauts’ Raz, Cave Story’s Quote, Machinarium’s Josef, Super Meat Boy’s Dr. Fetus, Portal 2’s Atlas (who’s Steam exclusive), Bit.Trip’s invisible Commander Video, and Spelunky's, er, Spelunky Guy.

We’re a little bummed that the DLC doesn’t offer new levels of some kind, but it’s hard to complain about anything when it’s a paltry $3, which, as developer Dant Rambo notes, is less than "a bag of hot dog chips." Still, here’s hoping we get some new levels to break in this new cast somewhere in the near future. In the meantime, why don't you watch these character introductions narrated by none other than Charles Martinet, aka, the voice of Mario. Yes, that Mario.