Merchants, items and inventory

Two major things and a whole bunch of polish this week. I wrote earlier about improving procedural dungeon generation, so I won’t rehash that; the other big feature this week was getting merchants and shops into the game.

I now have the ability to add buying and selling as actions when interacting with an NPC. Each NPC merchant will (currently) buy any item, and has a list of items that they will sell to players. Heavily inspired by old console RPGs like Final Fantasy and Pok√©mon , there’s also a shop location. I can alter this on a case-by-case basis, to customise the merchant themselves, the products they have on display, and the crafting workstation on the left.

I think I’ve got all the bugs, exploits and edge-cases worked out (like adding an item to your sell list, then consuming it in another window, then completing the sale of the now non-existent item, for example), but it’ll be interesting to see what players come up with. Buying and selling are kind of an important, potentially economy-breaking feature if there’s any horrific item and/or currency duplicating bugs left in there, so I’ll be keeping an eye on it for a while.

Because I’d spent so much time working with merchants and therefore items, I also made some improvements there. Can you believe BotLG contains 57 different items already (and I feel like I haven’t really even started on generating item content yet)? First, I consolidated the item types into a much smaller set — With that done, I added a dedicated inventory screen, which can be filtered by these new categories. Then, as a last bit of polish, I made it so that wherever an item is displayed, it shows an icon next to the text label. I’m really happy with how it looks, and now the console looks a bit more exciting while you’re gathering resources:

So this leaves me with just two major mechanics to implement: account-wide storage and account-wide progression through character retirement, which I’m hoping to get done next week. After that it’s just bug fixes, content and polish. I really want to completely revamp the starting area, so that players can get into a dungeon much quicker — and a more exciting one than the pretty trope-heavy Rat King’s Nest. This week (and last) have introduced a lot of new stuff, and the current maps don’t really show them off to the game’s best advantage; I actually think I’m going to hold back on making these things live until I have some shiny new locations in place.

This week’s changelog

Here are the edited highlights from this week’s changelog. You can view the whole list here.

  • As usual, BotLG is a little less idle and a little more roguelike. Every type of gathering node is now a limited resource. To compensate for limited resources, lowered global action duration to 3 seconds (from 8 seconds)
  • New skills: gathering, hedge magic, mining
  • New items: plum-nose mushroom, gorgeous plum-nose mushroom, myconic essence, myconic potions, part I, rough stone, copper ore, iron ore, silver ore, lump of coal
  • New recipes: distill (gorgeous) plum-nose mushroom into myconic essence; brew small healing potion from myconic essence
  • NPCs can now buy and sell items
  • Looking at a skill’s details (click the name of a skill from the skills panel) now shows which recipes you both know and have yet to learn. Learning a recipe now grants the corresponding skill at level 1 if you do not already have it.
  • The inventory panel now only lists the most recent items received, but contains a link to browse your entire inventory, which is filterable. Players can click an empty equipment slot to open their inventory filtered for items suitable to equip there
  • Each floor of a procedurally generated dungeon now requires a randomised quest to be completed before you can descend to the next floor. Closing the page or refreshing while in a dungeon will cause you to lose some of your inventory
  • Location name and difficulty is now displayed as the minimap window title
  • Consolidated item types down to: accessory, armour, bones, component, drink, food, ingredient, junk, potion, quest, recipe, weapon
  • Wherever an item name is displayed, its icon is also shown
  • Monsters now slow down when the player is chasing them, and will pause if they end up adjacent to a stationary player

People, places, and things

I’ve worked on three things, mainly, this week. I started out by implementing NPCs the player can interact with. Under the hood they’re essentially just the same as monsters, only they have a dialogue system for their main action, instead of combat. But there’s no reason why in future you couldn’t fight NPCs or parley with monsters. I created a simple branching dialogue system, where you’re presented with what the NPC has to say, and then you have some pre-canned responses to choose from that can lead to further dialogue.

BONES of the LOST GOD is based on a play-by-mail Labyrinth Lord campaign I ran back in the day. At the centre of that campaign was the city of Rooksfoot, an economically-thriving but morally dubious city dominated by a magical arena where sell-swords and adventurous hopefuls would fight to the death for a cheering crowd and the promise of fame and riches. I’m both excited and nervous to be re-implementing the city in this game, and having some NPCs seemed like a good excuse to put the first hint of the city in-game:


Getting past that guard forms the opening segment of the game, and forces the player to go explore the surrounding area. I have two or three different ways in mind for the player to get into the city for the first time, and once they’re in, coming and going as they please will become much easier.

The next thing I worked on was items. I made the view item screen much more detailed and attractive, and made a bunch of new items to support initial character creation, so new characters now receive a set of starting gear better tailored to their rolled attributes. Here’s an example item:

It’s listed as a two-handed weapon, with a strength attribute, so performing basic melee attacks with it will use your strength attribute. Most weapons are strength based, but lighter, more finesse based weapons will use dexterity, instead.

But the main thing to note here is how wielding the item — a staff in this case — actually grants the character access to two actions: fireball and basic attack. For the first time, player characters can now perform different actions in combat, instead of just wailing away with basic melee attacks round-after-round. I’ve been wanting to implement this for weeks, and finally it’s here.

BotLG is a classless game, but characters have attributes and items available to them that are very much in the mould of the traditional fantasy RPG. How your character behaves in combat (and elsewhere) is very much decided by the items they choose to equip themselves with. You can load yourself up with heavy armour, sword and shield and play a strong warrior type, or wield a poisoned dagger and light armour and be the assassin-rogue. This also allows for some neat customisation. If you want to be something a little more unique — a necromancer-bard, perhaps — that’s fine! Get yourself some evil robes covered in death-magic runes, and equip the biggest, baddest trumpet you can find.

Note: neither evil necromancer robes nor trumpets of any size have been implemented (yet). But they could be! And you’d get different spells and actions from each, and they might even synergise a little, and you’d be the happiest necro-bard for miles around.


My next steps are to spruce up monsters, so there’s a bit of variety as you’re exploring dungeon-like locations. Monsters work mechanically the same as player characters, so they also benefit from equipment granting actions to use in combat, but so far none of them are wielding anything that provides anything other than a basic attack.

In tandem with improved monsters, I want to add some quests into the game, so there’s a bit of structure to the slaughter. I already have code written that tracks when you need to collect items for a quest, how many you have, and if a monster should have a chance to drop a quest item. All that’s missing is some UI to allow players to start and complete quests, which I can now tie into the NPC dialogue system.

Making a monster

I’m working on combat. It’s kind of slow going, because it’s the most involved part of the game, and it needs a lot of other structures and objects to be in place first. Not least of which are monsters. Thanks to an audience suggestion, I’ve started with skeletons, a classic 1 hit dice monster.

For that, I needed a way of creating new monsters, keeping each unique copy of them persistent in the database, and managing them. I also wanted a way of making sure that combat could occur between players-and-monsters, monsters-and-monsters, and players-and-players. I big part of the BONES of the LOST GOD setting is battling in the magical arena at Rooksfoot, so I need to support all those types of combat.

The easiest way to go about that is to make sure that both Monsters and Characters are interchangeable; Monsters should implement the same interface as Characters. Looking through the game ruleset I’m using, with a bit of fudging and the invention of some creative items (monsters will have to invisibly equip items like “dragon’s hide”, “dragon claws” and “scroll of dragon’s breath” to set their AC, damage output, etc.) I don’t see why that shouldn’t be possible. So after a bit of work and some refactoring, I now have some new factory and blueprint objects.

When I want to create a new type of monster, I just have to crack open my trusty Monster Manual, and create a corresponding new Blueprint. This defines the monster’s name, appearance, attributes and statistics, equipment, and so on. I can create permutations of the same monster by defining some methods in there to return different values each time.

Then when it’s time to spawn a monster into the world, I take the Blueprint and give it to the Factory object, which creates a new Character and applies the settings from the Blueprint, resulting in a brand-new character/monster saved to the database. In fact, it’s so nice and flexible that I named them NPC Factory/Blueprints; and I’ll be using them to generate townsfolk, quest givers and the like, as well as monsters. It’s also pleasing to me that everything that’s alive and active in the game world is stored away in the same place in the database. There’s some enumerated flags in there so I can tell PCs and NPCs apart at a glance, and it seems to work quite nicely.

(In theory, all this means monsters and NPCs could be recruitable as player characters, further down the line. It also means it’s trivial to turn or clone player characters into NPCs; which is how I intend to do asynchronous PvP combat — it’s almost like I had a plan for this all worked out!)

Last but not least, I’m changing the way Characters are attached to Users; instead of tying them directly to the user’s account as I’m doing currently, I’ll be introducing the concept of a Party; a container for a list of Characters. Having this intermediary step means I can write combat as an event that happens between two or more parties, without having to consider who owns the party; all the UI will have to do is allow the player a way to assign actions to their Characters instead of AI and combat will progress non-the-wiser. Actually writing the monster’s AI, though, is a task for another day.