It’s been a few years since I first wrote about 13th Age one-shots, and it’s a long time since I’ve run a system that used to be one of my trademarks. But, as I’ve been prepping Swords Against Owlbears for All Rolled Up’s Free RPG Day event, I’ve got more to say about how some specific aspects of 13A play can be made to work in one-shots.
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So, here goes:
One-Shot Unique Things
In 13th Age, each PC has a One Unique Thing (OUT) that sets them out from the rest of the populace. It’s the start of an expectation that players will help to define the world and setting. For one-shots, rather than being campaign-level (“I’m the last of the dwarves” “I’m half-dragon half-halfling”) these can just be specific to the session planned… guide the players when they’ve picked pregens to choose, for instance, why they personally have to track down the orc chieftain, or what the Priestess’s minions stole from them.

I’ve previously been ambivalent about making players pick OUTs at the table, since sometimes they can just clam up, so have offered ready-made ones – but this links them to the play as well and helps to provide motivation for whatever gonzo plot you’ve got up your sleeve.
Dice Rolling Apps Are Your Friend
13th Age PCs are generally rolling their level number of damage dice – or more – each time they hit. Additional powers often add other dice to the mix, too – so unless you’re playing at 1st or 2nd level, encourage your players to use dice roller apps to do the arithmetic for them. Some players, of course, (the ones really quick with mental arithmetic) will want to add them up in their head – let them, but only if they really are quick enough for nobody else to get impatient. They will be the ones that thank you for it – it’s hard to resist adding up your neighbour’s totals for them if they’re struggling.
Dice rollers unlock high level play for one-shots, which is (a) awesome, and (b) not all that complicated for players. A few more options emerge, but your barbarian and ranger characters are still going to be really accessible for players who don’t want to balance loads of options.
Pick Three Icons Each
In 13th Age, players have a set of Icon relationships that are rolled at the start of each session and interact with the play, bringing powerful setting NPCs into the game.
Icon relationships in some of the published one-shots are left to be picked at the table. In my pregens, I’ve usually pre-populated them. Neither of these are really necessary. Just pick three Icons for each pregen that seem most likely for them – have the players do their icon rolls (either d6 for each of them, or just d3 for which Icon benefit they have if you want everyone to definitely have one – sometimes, I make sure they’ve all got one if somebody rolls none, sometimes I don’t.
Give them the icons on little cards to remind them to use them, too. And I’m fairly relaxed about them giving a system-based bonus in one-shots – they can
- Allow an additional use of a Daily power
- Punch up an auto-recovery if they drop to 0hp
- Grant a cool magic item of the appropriate tier (+1 for Adventurer, +2 Champion, +3 Epic) – let the player design it and give it a quirk
- Grant an extra turn in combat once
And so on. The best uses of Icon relationships are often in skill challenges or montages, but these give everyone a chance to own them and get some benefit from them, and the Icons interfering grounds the game in the world.
Campaign Losses – Limbs, Friends, or Items
Campaign Losses, generally, happen instead of Total Party Kills in 13th Age. The party can choose to retreat, lick its wounds, and try another way. In one-shots, this doesn’t make sense – and can mess with your pacing – so make them lose something important to them instead, and progress the story around the scene again. This might mean they still achieve the combat scene’s goal – so make sure what they lose is really big! You could even have an NPC captured, to set up a sequel one-shot! This comes directly from Swords Against Owlbears, where the titular battle in particular has some very nasty owlbear cub mooks (and a randomly-appearing owlbear mother) that could easily overwhelm players.
So, some more 13th Age tips – and a resolution from me to get 13A back on my circuit of convention games!