Making the Forts AI Whole

Work continues apace. Nick has been developing the single player campaign and touching up a few of the graphics. Jeff has started on the music but we’ve yet to hear it. We know it will be great!

I’ve had my head buried in optimisation, bug fixing and filling holes in the AI. In Forts you can connect to ‘neutral’ structures and instantly gain control of them. The AI was able to do this, but if the neutral part of the structure was destroyed it couldn’t replace it.

Now it can rebuild even if the whole structure is gone. At the beginning of the match it scans the world for structures it owns as well as neutral ones and builds actions from them for reconstruction. It ignores structures it never intends to connect to. Additional joint creation actions need to be added where the human recorded AI fort pattern connects with the neutral structures in case the destination node is gone.

Sometimes the AI gets stuck on a particular action, unable to execute it. I’ve introduced a frustration system so after several attempts it gives up. Frustration levels of all actions are decayed periodically, so any frustrated actions will be attempted again. Some actions can execute but form unstable structures that soon collapse. I’ve got to detect when this happens and add frustration so the AI tries something else.

Another thing the AI had trouble with was the ropes. They are treated differently to other materials in that when the player (or the AI) creates a rope the game creates a series of linked invisible and unselectable joints along the length of it. Any of these links can break, but the AI had no knowledge of them and so could not replace them. Now the game follows the rope back to the end joints and reports these to the AI script. It is also told about which link actually broke, which allows it to attempt reclaim of the dangling bits of rope.

To help me quickly test this functionality I’ve build specialised maps. The image below shows the AI rope test map. You can see a (dark) neutral structure in the bottom right; ropes don’t claim them. When you attach bracing, armour, etc. to the structure it lights up and you can manipulate it and any weapons on it.

Testing the AI reconstruction of ropes

Press round-up

As you know, since PAX Aus we’ve been busy developing the Forts, making great strides with the networking and the single player campaign. All the while, we’ve been getting a nice trickle of positve press, as the word gets out, through things such as Screenshot Saturday. Check out some recent mentions below.

GameLuv.com

Earlier this year, we submitted Forts to the 18th annual Independent Games Festival. Unfortunately, we didn’t win, but did receive a positive reception from GameLuv.com who selected us as one of the 20 best games in contention. There were more than 700 entries.

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Thumb Throne

This enthusiastic write-up from ThumbThrone.com that really sells what the game is all about, and makes a positive comparison to the classic game Worms, which is a definite inspiration. It’s great seeing people really connect with the concept, like this.

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Indie Game Enthusiast

As you might expect from their name, enthusiasm is again apparent in this article from IndieGameEnthusiast.Blogspot.com. It’s a well researched piece, which not only features the trailer, but also gifs and screenshots. Always welcome!

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Game Watcher

Forts is often compared to World of Goo, and this comparison comes up again in this GameWatcher.com article, which is no bad thing. Less good is when the Forts is mistaken for a ‘tower defence’ game. Nevertheless, the author has listed a lot of the features that makes Forts so unique, which is always welcome.

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PC PowerPlay Preview

While at PAX Aus 2015 we had the pleasure of meeting Meghann who writes freelance for PC PowerPlay. Tim gave her a demo of the game. “I can see myself spending a lot of time on this”, she said at the time. PC PowerPlay was writing a feature on the best 12 indie games at the event. Meghann devoted a whole page of the six available to a preview of Forts! You can find it in issue #247 which has just hit the shelves.

Screenshot Saturday

Playing around in with chain reactions and Single Player map ideas.

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Drill Instructor Demo

While digitally painting the Drill Instructor character, Nick recorded his art process, which you can watch below. Complete with commentary, Nick shows you the techniques he uses in creating the Forts art style.

Screenshot Saturday

Tim ‘Crackshot’ Auld has made some jammy shots in his time, but this one takes the biscuit! #241

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Rocket Chainsaw Article

During PAX, we had the pleasure of showing Joseph Rositano the ins and outs of Forts, and he’s done a bang up job of writing up his experience with the game on Rocket Chainsaw.

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PAX Aus 2015!

It’s been two weeks since PAX Aus ended. We’ve taken stock of what happened and what we accomplished. While it was not the first time we had publicly shown off Forts (that honour goes to our local GameOn exhibition), it was certainly the biggest yet. There were a lot more people coming past and press booking interviews. With the exhibitors fee, flights, accommodation, and a fair bit of preparation needed, the stakes were pretty high. Would people ‘get’ the game? Was it stable enough? Were people able to learn the controls? Do we have a chance of getting some good press? Let’s find out, dear reader.

We managed to get all of our equipment to Melbourne without damage and did most of our set up on the Wednesday, giving us time to troubleshoot anything before the expo started on Friday. We only had two playable terminals and one small TV to loop the teaser trailer plus another video that Nick had made to show the features of the game. I had built a mini ‘fort’ to hold our monitor. The idea was to get it above the crowd so people could see it from a distance. I even drilled bullet holes and stenciled burn marks radiating out from them. We had 1000 Forts contact cards and some candy for people to take. Thursday was spent tracking around Melbourne getting a few missing items such as a suitable ethernet cable for multiplayer games, head phones, gaffer tape, an adapter, screen wipes, insoles (a great feet-saving idea), and Strepsils (thanks for the tip Kamina!). We even had matching Forts t-shirts and the sign that Nick designed looked brilliant.

Nick and Tim in front of the Forts stand at PAX Aus 2015
Artist Nick Smith and coder Tim Auld with the Forts stand at PAX Aus 2015.

The press were there an hour earlier than the general public were let in on Friday. We managed to get ready to show the game in time, but it was not a mad rush to begin with. At about 9am the crowds started trickling through and Forts started to get some attention. The punters were getting into it, it was great! We had planned to run a ‘tallest fort’ competition on a special mini-game map, but too much fun was being had blowing stuff up so we dropped the idea.  Many were signing up to our mailing list anyway.

On the first day I counted six people who came up and said that Forts reminds them of a pencil and paper ‘game’ they used to play when they were young. One dad even said he still plays it with his son. The way it goes is each player draws up a fort on each side of the paper, puts in little weapon emplacements, and then takes it in turns to draw dashed lines, showing where the projectiles were being fired. Yes, it relies heavily on imagination. It’s so unfortunate that none of the original battles I drew from my childhood have survived. I was happy to see the game evoking nostalgia in so many.

Cosplaying monk playing Forts
Monks are one of our target demographics.

Quickly it was discovered that the game as presented was too hard for new players, so I made a few changes at the end of the day to improve the situation. The swarming missiles’ incendiary capability was disabled. The fire was made to spread at half the rate and do half the damage. The repair area radius was doubled. Some of the AI’s forts were crippled a little bit too, as they would just pepper the new player, making it difficult to coach. In spite of the learning curve, the PAX goers were excited about the game and many wanted to know when it was coming out. We ended up giving away about 750 of our cards.

During a lull I suggested to Nick we have a multiplayer battle against each other to show how the game plays out at high skill levels. Soon there was a gathering around us watching the game. It was a fun match and two of the spectators wanted to play each other afterwards, even though they hadn’t played it before. Nick and I coached our respective fort commanders; it was very tense! Nick’s player was victorious with a tried and true laser attack, our fort having insufficient armor to take the blow. We would have loved to see more of these head-to-head games, but one or both terminals were almost always in use, making it difficult for friends to claim them both at the same time.

Cosplayer asking about Forts.
Deadpool is one of the biggest (and tallest) Forts fans.

Saturday was supposed to be the biggest day. It probably was a bit more busy but it was hard to notice. You have to remember to eat and drink. The insoles and Strepsils were serving us well as being on your feet talking all day takes its toll. We were having a steady stream of media come and ask us about the game with varying degrees of preparedness. It was always fun, as they asked some of the best questions. It’s been thrilling to see us top a few ‘best indie game at show’ lists.

Crippling the AI fort by taking out their big weapon proved to be counter productive. It meant the player could be coached without the threat of being wiped out instantly, but when left alone the player would just continue indefinitely, preventing others from trying. I had to reintroduce the cannon to one of the maps to give the battle a timely end.

Cosplayer trying out Forts.
Gauntlets are not recommended when playing Forts.

By Sunday we had our pitch and coaching routines down pat. People seemed to learn it faster and have more fun. The AI was still making it difficult. More effort will have to go into making a good show map and configure the AI to give players a chance to learn without leaving it open ended. We were enjoying ourselves, and some people were coming back two or three times. A few were turning up saying a friend had recommended they check out our game. It felt great to hear that.

After a hectic weekend I got about half an hour to wander around and play a few of the other indie games in the PAX Rising area. I wish I had more time to do this; it was good to meet other developers and talk about their pride and joy, the issues they were facing, and try some cool games. The amount of support (moral and practical) shown between indie devs was wonderful, and I think everyone partly wished the event would never end for this, and other reasons. It’s definitely huge for a developer to have a face-to-face conversation with someone who instantly gets their game and wants to know more about it. Same goes for talking with other devs, and some of the conversations can be extremely useful. We received a few hot tips which may make a big difference.

It was such an awesome event. We’re grateful to the organisers, the attendees who gave our game a go, the other devs who gave us support and words of encouragement, and the press who have written, streamed or podcasted about the game. We’re happy that the game was solid and fun for you. Thanks for being patient with the difficulty – we’re working on it. Thanks also to Anna for making us (and Nart) healthy lunches and snacks every day.

I hope we see you at the next big show!