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Blade Kitten for PS3: Artificial Intelligence, Physics in a 2D World

Chris Fowler's Avatar + Posted by Chris Fowler on Jul 27, 2010 // Senior Programmer, Krome Studios

Working on the PlayStation 3 has been wonderful. As this was my first project on the PS3, I was apprehensive at first about the new technology and how to use it as best we could. But now, I can honestly say I am a fan of the PS3.

Blade Kitten for PS3 (PSN)

Early in development, Blade Kitten was both a 3D and a 2D game and you could switch between them instantly — you’d run through a section then it would transition to 2D. It didn’t take us long to fall in love with the 2D version, so we focused all our efforts on making the 2D the fun game it is today.

From the start of our project, our goal as programmers was to give the designers all the power they needed to create the game that they wanted. Ideally, a level designer controls the player’s progression and experience in each area of the game (enemy placement, special events, collectables, and so on). So rather than implement a boss character’s attack moves myself, I would give the designers scripting tools to implement the boss themselves.

Blade Kitten for PS3 (PSN)

This proved to be one of the best decisions we made. For example, the level where Kit is running away from a huge monster called Acland, who destroys everything in his path, was completely scripted by the designers — as were all our bosses and many of the encounters you see. This has allowed for a much more flexible design with changes being quick and easy. But most importantly, much happier designers!

Being able to move any object anywhere and have our characters move along with them was fundamental to our game, so we made it so Kit can attach to pretty much everything. If the object moves or rotates, so does she. The level designers have done a great job using this and, even from the first level, you will see some fun movement and puzzles you can play with using these moving objects.

Blade Kitten was a re-think of how we normally do artificial intelligence. As there is a single plane that everyone fights on, we needed to make all the enemies work together without getting in each other’s way. Therefore, you’ll see things like the front guy duck down so the guy behind him can take a shot, or even have one guy jump over another to try to aggressively get to you. They all work together which helps create an interesting experience without overwhelming the player. It’s important that the enemies in the game feel like they are alive and are planning their strategy together to form a real challenge to players.

It was fun to get physics working properly in a 2D environment. We have some items which are fully 3D enabled and allowed to fly off into the yonder. Enemies have “ragdoll” effects that have them falling down in different ways when hit, and “fraggable” objects that break apart realistically. Additionally we have items that are fully physics-driven but stay on the player’s plane so you can use them without worrying about them flying away from you. This goes towards making the game world deeper, more detailed and unpredictable.

I hope you all enjoy this game as much as we have enjoyed making it.

//Add Your Own

61 Comments

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1

+ zekececil14 on July 27th, 2010 at 12:02 pm said:

Interesting!


2

+ xeno3d on July 27th, 2010 at 12:03 pm said:

This game looks cool


3

+ Vorax07 on July 27th, 2010 at 12:03 pm said:

Hmmm


4

+ LpSquall on July 27th, 2010 at 12:03 pm said:

Looks good. Release date?


5

+ DION3TO on July 27th, 2010 at 12:04 pm said:

Hmmmm liked the art.


6

+ ForgiveMyAim on July 27th, 2010 at 12:06 pm said:

Reminds me of Viewtifull Joe


7

+ GJD21 on July 27th, 2010 at 12:06 pm said:

Any game with blade and kitten in the title has to be cool


8

+ Dracorius on July 27th, 2010 at 12:07 pm said:

I agree, this looks interesting and promising.


9

+ Shinmigami on July 27th, 2010 at 12:09 pm said:

Is this a psn game?


10

+ APVangeliLHS on July 27th, 2010 at 12:10 pm said:

Hmmm… more PS3 news…

And the PSP get’s some lame knockoff of a flash game I can play for free right in it’s browser…


11

+ MarinoBrea on July 27th, 2010 at 12:10 pm said:

I dig the art style, hopefully there’s a trailer in the store or a demo.


12

+ nicksizzle48 on July 27th, 2010 at 12:11 pm said:

wow, very, well…..interestiiiiiing


13

+ Tikicobra on July 27th, 2010 at 12:20 pm said:

I like the art style and it looks pretty fun, but I hate that main character.


14

+ Mercerius on July 27th, 2010 at 12:28 pm said:

Yeah, I checked the home site. It’s coming to PSN. Looks interesting!


15

+ SykoTech on July 27th, 2010 at 12:33 pm said:

Looks good. Hopefully it’s as fun as Strider was.


16

+ Dokuro-chan96 on July 27th, 2010 at 12:33 pm said:

wonder how much fun this is?


17

+ whitwhit on July 27th, 2010 at 12:34 pm said:

release date???


18

+ Bad_Brains on July 27th, 2010 at 12:41 pm said:

No release date mentioned?


19

+ Fluidshine on July 27th, 2010 at 12:44 pm said:

Looks great!!! When is it coming out??? I want to play it! lol


20

+ FredPunella on July 27th, 2010 at 12:44 pm said:

Junk.

Next…


21

+ ssjmichael on July 27th, 2010 at 12:48 pm said:

This game looks incredible. Can’t wait to see more of it


22

+ Destiny89 on July 27th, 2010 at 12:48 pm said:

Release date?


23

+ yazter on July 27th, 2010 at 12:49 pm said:

Looks nice!


24

+ subbed on July 27th, 2010 at 12:49 pm said:

Visually looks very nice. Sounds like you enjoyed the tech. Oh I do agree with the previous poster the main character is not something I like. Hopefully you got some customization that can at least change the colors a bit.


25

+ Chuckbait on July 27th, 2010 at 12:51 pm said:

Does this come out today? If not, I’ll pass. August 10th— Scott Pilgrim vs. The World. RiverCityRansom Baby!


26

+ C-Murph666 on July 27th, 2010 at 12:54 pm said:

Hey! Remember when this was PSN Exclusive?!


27

+ Sindred on July 27th, 2010 at 12:56 pm said:

After reading about this game on Gamefan, I’ve been looking forward to it. Can’t wait to play this.


28

+ Trieloth on July 27th, 2010 at 12:58 pm said:

The game is looking really cool. 2D or not 2D?!


29

+ KazeEternal on July 27th, 2010 at 12:59 pm said:

@24
Ya, those were happier days.


30

+ BlooodyCow on July 27th, 2010 at 1:01 pm said:

@24 C-Murph666
I remember when this was supposed to be release back in the Spring but got delayed to Fall because they wanted to release it on the Xbox 360.


31

+ TheTwelve on July 27th, 2010 at 1:02 pm said:

I heard this game wasn’t PSN exclusive anymore. It will therefore have to be exceptionally good for me to pick it up now. We’ll see.

12


32

+ Jetup on July 27th, 2010 at 1:15 pm said:

Wow this game looks like it changed from the last time we’ve seen it. Good to you guys.


33

+ rw1494 on July 27th, 2010 at 1:16 pm said:

WHEN IS THE MADDEN NFL DEMO COMING OUT!!!!!!!!!!!!!!!!!!!!!!!!!!!


34

+ subbed on July 27th, 2010 at 1:16 pm said:

exclusive = quality or value?

If a game is good who cares about exclusivity, and in turn if its bad who cares?


35

+ Berae on July 27th, 2010 at 1:23 pm said:

looks fun but i dont like the main character


36

+ PullusPardusUS on July 27th, 2010 at 1:33 pm said:

i’ve already read the comics and i’ve quickly became a big fan, i am waiting eagerly for this.


37

+ Yoinazek on July 27th, 2010 at 1:34 pm said:

Great marketing strategy :)


38

+ Sria on July 27th, 2010 at 1:35 pm said:

looks quite amazing ^-^


39

+ xAllanKx on July 27th, 2010 at 1:52 pm said:

release date please


40

+ Anddo on July 27th, 2010 at 1:54 pm said:

when is it coming?


41

+ Jeigh on July 27th, 2010 at 1:56 pm said:

Does exclusivity matter? Let me ask a broader question: do bragging rights matter? Think that one through and if you come up with a clear-cut answer, you didn’t think hard enough.


42

+ Jeigh on July 27th, 2010 at 1:57 pm said:

Don’t get me wrong- I still think this game looks good, and somewhere down the road I fully expect I’ll pick it up. After all, action games of this sort don’t come along very often on PSN.


43

+ spideyal on July 27th, 2010 at 2:01 pm said:

If this game comes out today, I’m buying it. Fact.


44

+ Sria on July 27th, 2010 at 2:13 pm said:

After visiting the site I noticed that this is based off a webcomic, and a very entertaining one I might add. I’m definitely gonna purchase this once it’s out, and plan to start purchasing the collections soon as well.


45

+ AnthonyTonyMagic on July 27th, 2010 at 2:22 pm said:

The name “Blade Kitten” has almost guarantee’d a first day purchase from me.

All you need now is a wolf or a ninja and it will be instantly epic.

Waiting for Blade Kitten II: Revenge of Ninja Wolf


46

+ D-Squad3 on July 27th, 2010 at 2:24 pm said:

When does it come out?!!


47

+ AnthonyTonyMagic on July 27th, 2010 at 2:25 pm said:

The big question is, will Blade Kitten be in 2D or stereoscopic 2D? :D

You have to use the machine to its full potential


48

+ unstablefears on July 27th, 2010 at 2:38 pm said:

Nice, really looking forward to this game!


49

+ jh6269 on July 27th, 2010 at 2:47 pm said:

Oh please let this be out today, I’ve been waiting for this game for ages!


50

+ Moonglare on July 27th, 2010 at 2:50 pm said:

Seems pretty nice! Can’t wait to get my hands on it =)


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