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Oct 23

Oct 23

Uncharted: Drake’s Fortune Update – AI & Animation

Christian Gyrling's Avatar Posted by AI and Animation Programmer, Naughty Dog



As one of the programmers on Uncharted: Drake’s Fortune I’d like to give you some insight into the development process in creating the game’s characters.

We are a very small team creating the enemies here at Naughty Dog. Therefore we needed to be smart about how we approach creating the characters and deciding where to spend our time. We have some very talented animators here and that was something we wanted to leverage when trying to make the characters come to life.

The final AI in Uncharted is simple, yet also very powerful. We are heavily utilizing the Cell architecture to allow the enemies to be more aware of their surroundings. On top of this, the AI is highly configurable to allow the designers to create custom behaviors. Examples of this are combat distance used for close-combat/ranged enemies, likelihood of moving and reaction times, grenade throwing and shooting styles. The goal was to make the AI ‘seem’ smart. If we could do so without making the code complex, that would be great. The approach we took to this was to use animations to add variations to our characters instead of trying to programmatically add complex behaviors.

Halfway through development of Uncharted I sat down with the animator for the enemies (yes, only one animator) and played the game. We wanted to see what the player sees the enemies do the most because those would be the areas in which we wanted to focus our energy. We found that enemies getting hit and dying made up a large portion, and a fun one. Other areas were enemies entering combat, attacking from cover positions and, what we call, open combat – enemies standing in the open shooting at you.

Knowing this, we went to work. We wanted to give the player a rich experience by being selective in which areas to add variety. I’m pleased to say that the main enemies, pirates and mercenaries, have hundreds of animation variations in these areas. All of this makes the game experience richer and avoids repetition.

This, together with endless hours of fine tuning, resulted in the smooth and believable characters in Uncharted.

Right now we are in the process of making the final disc. Pretty much everyone is playing the game – not because we have to, but because we want to. People are trying to find all the treasures in the game or beat it on every difficulty level, which is not an easy task. I find it amazing that after working on the game for this long we all still really enjoy getting immersed in the story of Uncharted.

I hope you all will enjoy Uncharted: Drake’s Fortune as much as we do.

Add Your Own

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zookey said:

October 23rd, 10:09 am

Nice! It is cool to see how passionate you are about your art–keep it up!

Daver said:

October 23rd, 10:12 am

November wont come enough fast :)
This game is gonna be great!
Must buy for all ps3 owners

lakaihigh said:

October 23rd, 10:18 am

I know that I am going to enjoy Uncharted as much if not more than you guys do. I am buying this on day one and I can’t wait for november 20th to finally come.


naughtyco said:

October 23rd, 10:21 am

Once again, I’m proud to own a PS3 because of titles like Uncharted.

Blueangel said:

October 23rd, 10:39 am

Hi !

When the game is going to be master gold ?


wolverine81 said:

October 23rd, 10:43 am

I can’t wait for Uncharted! You guys at naughty dog just keep teasing us!

King-@ said:

October 23rd, 10:44 am

To N° 5: I Totally agree with you, it looks like a small atomic explosion; it wastes the extremely realistic look of the game :( FIX IT IF YOU HAVE THE TIME!!!! for the rest, this game is going AAA

sascha23 said:

October 23rd, 10:47 am

Looking very forward to this!

Closing the year out the right way in 2007 for the PS3.

Of course 2008 looks to be simply stunning with AAA exclusive releases.

Coke-a-Cola said:

October 23rd, 10:53 am

Thank You Christain G. …..& all….Naughty Dogs.

If the PS3 is the Cake then ” Uncharted “is the icing ~
And so very fine a thing it is too .

Absolutely Brilliant Production ! !!

LiquidMetal14 said:

October 23rd, 10:56 am

Bravo ND, Bravo!

Blueangel said:

October 23rd, 10:56 am

Found this…0&mc_id=1023nl

About the water in Uncharted.

osirisomeomi said:

October 23rd, 10:57 am

Thanks for the update, I look forward to buying your game.
Glad to see you’re reaching out to the community in this fashion, it’s really appreciated by consumers like myself.

A question: What about non-pirate/mercenary enemies?

leetfoo said:

October 23rd, 11:10 am

Looks great, and it’s nice to see a team so into a project. Thanks again (and again and again) for adding 1080 support.

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Christian Gyrling said:

October 23rd, 11:11 am

Well… all characters in the game have been developed in the way described above where we played the game and added animation and AI variation where the player would see it the most. This holds true for the non-pirate/mercenaries as well as the friendly characters.

nmc75 said:

October 23rd, 11:12 am

As to the comments on the Cell architecture used, can you comment on how many of the SPU’s were used in Uncharted (enemy AI and in total) and what you felt was the % of power harnessed for Uncharted?

Naughtydogrocks said:

October 23rd, 11:21 am

This game is looking really sweet i can wait to see the final product, i only know one let down about the game it doesn’t effect me but other people really are disapointed in it and that’s the video including the jet ski people are complaning about the water effects and the way the barrels just disappear when they explode its nothing critical but if you have time to take it into consideration they i think you guys should… is the link to what people think:

GamerMan76 said:

October 23rd, 11:22 am

@nmc75 Although as a computer geek I can appreciate where you are coming from, I think you have lost direction into what games are supposed to be …
I mean honestly as long as the game is fun and can keep you entertained who cares if it uses every SPU or all 100% or even 10% of the PS3’s power.

Did you get the system to play the games coming out for it or to nit pick everything to death and not enjoy gaming?

Personally I think Uncharted will give me an Indiana Jones character and feel with the story and play of the game and I can’t wait and am glad that the animations will be unique enough experince everytime we kill one.

I look forward to this game as a day one purchase for myself :)

StormLord said:

October 23rd, 11:38 am

thanks for the info, the game is looking very good :)

nmc75 said:

October 23rd, 11:40 am

@ 17

wow. you are reading more into my question than I intended. I will always take a fun game over tech. specs. anyday, which explains why I am into console gaming for one thing over say, PC gaming. I already have Uncharted on pre-order.. why can’t I be interested in how much of the PS3 architecture was utilized for this first Naughty Dog release? I like to imagine how the games in the next 5 years may look and play given what is released today. My apologies for asking… and wondering!

Full-Recovery said:

October 23rd, 11:44 am

I love the amount of work you guys and gals have put into Uncharted. This is a must buy title for any PS3 owner.

Is there a collectors edition?

SPARDA said:

October 23rd, 11:45 am

I cannot freaking wait to play your game.
Sony is extremely lucky to have you guys as developers.
ND will e the first one to truly show the potential of the PS3.

Keep the news coming.


boxmyth said:

October 23rd, 11:46 am

I’ll get my one worry out of the way (day one purchase of course, but): while you say you’ve put a lot of effort into the animation of the enemies, in all the videos I’ve seen, there’s not a lot of variety among the look of the enemies. The pirates all look the same, the mercenaries all look the same. Is that just due to the videos being of early builds or is Drake really going to be shooting the same two bad guys a hundred times over?

frito said:

October 23rd, 11:47 am

i too am interested in how Naughty Dog utilized the PS3’s architecture-

the success of the PS3 is hinged on developers finally being able to control the Cell and it’s SPU’s- so they can be free to make the games enjoyable!


brambler said:

October 23rd, 11:50 am

Is the game still on schedule for a November 20th launch?

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Christian Gyrling said:

October 23rd, 12:09 pm

We are utilizing all SPUs in Uncharted for AI, animation and lots of other systems. We are however just starting to tap into the power of the Cell. In future games I can promise even more utilization of the Cell which will result in more of everything, including game play.

In regards to pirates and mercenaries all looking the same, it might be due to that particular section of a level. There is a nice variety of looks for the enemies which will show more and more as you get further into the game.

As far as I am aware there is unfortunately no collectors edition.

The game is still scheduled for November 20th in the US and Dec 6th I believe in Europe.

Solace said:

October 23rd, 12:28 pm

Wow. You know your game is beautiful when all anyone can say bad about it are totally minor nit-picky things. ;)
Congrats to Team ND who, along with Insomniac, are ready to give us all an amazing 1-2-punch of good games this season!

Seraphim said:

October 23rd, 12:42 pm

this is one of only 2 games I’m absolutely excited to get my hands on this Holiday season. I just hope I can put down my PS3/360 versions of Assassins Creed long enough to actually play Uncharted once it’s released. Surely a must buy though. If you’re a PS3 owner and don’t buy Uncharted then you got some issues. Probably the issues that state games “need” to be online to be worth owning, Lol, seriously. *shakes head @ those knuckleheads*

chase said:

October 23rd, 1:11 pm

will there be some kinda leaderboard
will there be any support for home

Garinol said:

October 23rd, 1:11 pm

Christian and all the Naughty Dogs – You guys rock! Looking forward to play Uncharted soon.

aaquib said:

October 23rd, 1:16 pm


According to EGM, it won’t have support for the Trophies in Home, but there will be themed environments of Uncharted, as well as costumes. It was the November issue on EGM.

nmc75 said:

October 23rd, 1:35 pm

@ Christian, thanks for the reply on SPU usage. I think Uncharted is one of the better looking games out for the PS3 and other systems right now, and I can’t wait to play my copy on 11/20 as well as check out what other games Naughty Dog will be releasing in the future!

frito said:

October 23rd, 1:43 pm

@Christian, thanks for your reply, looking forward to this game, and even more so the new games you will be making with your new knowledge of the Cell..


So once a developer cuts his or her teeth on the Cell, do you guys then share that info with Sony and other Developers? Or do you keep it in house? Just wondering, it seems like someone should write a “Cell Programming Architecture for Dummies” and distribute it to all the other developers who are saying the PS3 is too hard to develop for..

Thanks again for your responses and looking forward to November 20th!

DoggySpew said:

October 23rd, 1:47 pm

Sooo, the disc is being finalised. This probably means a big “Has gone GOLD” party at Naughty Dog.

Blueangel said:

October 23rd, 1:50 pm

Thanks Christian !

When do you think you will hit master gold ?

Christian Gyrling's Avatar

Christian Gyrling said:

October 23rd, 2:00 pm

All PS3 developers have access to the PS3 development network. There we have forums where we share findings and solutions. Also, there will be quite a few Naughty Dog people giving talks at next years Game Developers Conference to further communicate the solutions used to develop Uncharted.

We went ‘gold’ last week. Right now the game is in other words 100% done and is currently going through the approval process.

redDragon said:

October 23rd, 2:04 pm

I know some developer’s can test how much of the PS3’s power they’re using… Do you guys have at least a rough idea of how much power of the PS3 your using with Uncharted?

Anyway, I’m very eager to see how all the animations will look and play out. In some videos I can already see a few different ones at work.

Blueangel said:

October 23rd, 2:05 pm

Yeaaahhhhh ! The game is GOLD !

Hoping to play the demo soon on PSN.

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Christian Gyrling said:

October 23rd, 2:16 pm

We have some pretty sophisticated tools that give us detailed information about the amount of ‘PS3 power’ we are using. We have been using this data to make Uncharted what it is today.
However, for every day that goes by we get a better understanding of the platform which will make the next game incredibly exciting to work on. I’m already very excited.

chase said:

October 23rd, 2:21 pm

a must buy day 1 for me

Blueangel said:

October 23rd, 2:24 pm

Hi again Christian !

Can you give us a clear answer whether yes or no the look of the explosions is always the same aka mushroom type of explosion or micro atomic explosion ?


Dno said:

October 23rd, 2:26 pm

jak is next i hope!!!!!! you no it is dont lie!!!!!

Blueangel said:

October 23rd, 2:28 pm

Last question from me Christian

Do you have any hint to give us as to know when we are going to have the demo on PSN ?

Thank you very much.

WHAT said:

October 23rd, 2:33 pm

I have been avioding this game. Cause I want to play it. You guys seem like you have shown too much already. The stuff up on the PSN. Is that stuff part of the unlockables in the game. Cause they did that with Heavenly Sword. Which was pretty cheep if you ask me.

chase said:

October 23rd, 2:47 pm

The explosion effects have they been update because The water around it doesn’t move.
i mite be picking around but i had 2 ask

Kamahl said:

October 23rd, 2:53 pm

wow, it really sounds amazing, everytime i read something like this, i’m impressed, can’t wait for the demo, or even better, the final release!

Aerfox said:

October 23rd, 3:42 pm

Good job Naughty Dog, you make great genre’s with Crash Bandicoot and the Jak series. I hope for the best for the Uncharted Series. I’ll be picking this title up in the first week. November’s gonna be a busy month with Haze, and Assassins Creed, along with this title. I’ll be jam packed playing these great titles most of the holidays. If you could Christian answer if we’ll be seeing a demo of this game in the PS Store?

Evazan said:

October 23rd, 3:45 pm

Demo soon!? Please!!!

kamari-ice said:

October 23rd, 4:00 pm

This game is Gold now? Mark me as being happy. Uncharted is coming, and I can’t wait. I hope we get an Uncharted demo soon! :D Naughty Dog, ya’ll rock!

Clover09 said:

October 23rd, 4:55 pm

All I gotta say is thanks for making a game that has vivid colors and none of that black, brown, and grey colored game style. From what I have been seeing from this game it’s going to be a hit. I can’t wait to see what else you guys have in store for PS3.

chintz said:

October 23rd, 5:42 pm

this is gonna be too awesome for words and all the 360 fanboys will be crying “cmon naughty dog, we want uncharted”, thats when us ps3 owners can point and laugh.

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