Day of the Octopus is the starter adventure included with Marvel Super Heroes basic set, first published in 1984. It’s a straightforward adventure that I remember liking when I first picked up Marvel (considerably later than 1984!), and it still stands up well. It’s got some lessons in it for prepping a one-shot, especially for convention play, and I think it bears a closer look. It’s also available as a download on the Classic Marvel Forever website, if you want to give it a closer look.
Specifically, it does a few things well
- it demonstrates the expectations and structure of play
- it’s designed to teach the rules as it goes
- it gives a solid approximation to a dramatic arc
There’s a few things it does… less well, I guess
- it’s almost entirely linear. There’s one branching point, but that’s only if the PCs get captured
- it’s dramatic scenes all resolve around combat – even one where combat really isn’t the actual resolution still looks very combat-y to the players
Overview
It’s designed with specific heroes in mind – Spider-Man, The Thing, and Captains Marvel and America. In the first scene (or Chapter as they’re called in the adventure) this is important, as they start interacting with their day-to-day lives – Peter Parker is with Aunt May, The Thing is sulking in the park, Captain America is with his “gal.” It also demonstrates the classic superhero team structure in RPGs – that although the heroes are normally arranged into specific teams in the comics, in the game they can form a team of whatever heroes the players want to play.
It’s a 1984 adventure, so there’s boxed text – but it’s pretty decent boxed text though – no need to describe dungeon rooms makes it flow easily. Each chapter also starts with a short comic strip, where we see the start of the action, which is a nice touch – I particularly like the investigative scene where The Thing is a deerstalker, especially because it makes him look a bit like Bungle from Rainbow.
It’s designed to be used with the maps supplied – this book came in a boxed set, of course, and there’s a fair amount of tactical faffing about where to place various PCs and their opponents that was probably a lot more important back in the day than it is now. Maps for superhero games leave me cold – especially when there’s two characters that have fairly limited movement alongside two with massively fast movement – can’t Captain Marvel travel at the speed of light? Why does she need a map?
Structure
Overall, the plot looks like this:
In Chapter 1, the PCs start separately, while still on the same map, and face one or two Thugs (normal humans) each. These are trivially easy fights, and this chapter shows up as a nice little training mission. In my one-shots I often have an easy fight as the first scene, and this approach (having a really, really easy fight)is something that I’d like to try. I’d expect both encounters to only take a round or so, so it’s a good stakes-free way to teach the basic rules.
No sooner are the thugs dealt with, Chapter 2 starts, where some actual supervillains (one per hero – another superhero RPG trope – and somewhat randomly assembled) appear and try to steal the same tech. It’s expected that they’ll be thwarted, and a Dr Octopus arm will get the tech anyway, but this is the first real fight of the adventure. It has detailed notes for how the villains will fight, which is a thing we don’t often see enough of these days I think – even if Radioactive Man’s first action is to blow a hole underneath The Thing so that he has to spend three turns climbing out, which feels a little bit mean on that player.

CSI: Marvel Super Heroes
In Chapter 3, they do some investigating, which is snappy and has multiple routes and ways of finding their way to Dr Ock’s hideout. There’s three places they can go to pick up clues – the site of the battle, the rental company they got the truck from, and a dive bar on the waterfront. It’s expected they’ll go through these places in order – if I was running this I’d add multiple clues to each location so they didn’t have to go to all three (or could split up), but it’s still presented as a pretty pacy segment, and isn’t reliant on dice rolls to move the plot forwards.
Chapter 4 is the hideout itself, where they fight Dr Octopus, any remaining supervillains from the previous battle, and several environmental effects. This is definitely mean to potentially be a tough one, as Chapter 5 is what happens if they lose, and begins with each hero being captured individually and them needing to escape.
Chapter 6 is the final scene, when they try to stop a gigantic Octobot as it rampages through New York. This fight is almost unwinnable, but it’s also much more of a problem solving challenge – the robot isn’t something they can take on directly, so they need to try and disable it using trickery. In game terms, this is almost a skill challenge compare to the fights beforehand – which is also a nice way to mix it up.
Unpacking the Plot
So, the structure looks roughly like the diagram above. We have 4 core scenes – a training level, a normal challenge scene, and two hard challenge scenes, with two of those being fights and one being more of a skill challenge. There’s a few different ways to move between what is basically a linear plot structure, and there’s a safety net in case they don’t get any further.
The safety net is a bit weak though – it’s Thor – who can either swoop in and save the day in a fight, or just tell them clues if they miss them. I don’t think there’s anything wrong with this kind of contingency plan in a one-shot, but I prefer some immediate, tangible consequences to a failed scene – maybe Thor does offer the details of Dr Octopus’ hideout, but that means they have time to prepare themselves and the next fight will be tougher, or the robot starts rampaging sooner.
For me, I like to have the final climax be a big, challenging battle (this also removes the need for a “contingency Thor” for that scene) and make the skill challenge be the middle scene. For skill challenge, it could be something different to an actual fight, but I think it needs to be an extended task that is supported by the system – in Fate this could be a Contest or a Cliffhanger (from Masters of Umdaar), it could be a Chase scene in Savage Worlds or Call of Cthulhu, a starship combat in a sci fi game, or a social conflict in a system which supports this. In all cases, it’s worth hanging some proper stakes on the scene, so it has tangible consequences to the folowing scenes.
I really like the first scene of this adventure – by introducing the players individually, and giving them a small interaction with the rules, they set up a low-stakes way of teaching both roleplaying and the basics of the rules. I’ve done this with individual skill checks before now, but not with really weak opponents, and I’d like to try it out with that – either with the heroes as individuals or with them together teaming up against a small obstacle.
I’ll definitely be re-skinning this structure and trying out some of the ideas here, and I’ll post on here and twitter about how it goes. I’m going to pull out some other ‘classic’ one-shots and do a similar unpacking of them – what should I look at next?
[…] combat encounters of longer-term F20 games are generally unsatisfying. Mix it up, too – as here, it’s an idea to start off with a really underpowered fight as a training level for the […]
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Nice! Great to see classic Marvel get some love.
I’d consider any of the Marvel modules to be good candidates for your one-shot analysis. I like the way you diagram the plot, very useful. Maybe Murderworld would be another good one to look at?
For other game systems, have you done The Haunted House / The Corbitt House from Call of Cthulhu?
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