Show HN: I built a multiplayer game where you're an aerial fighter cat

80 points by pawelwentpawel 18 hours ago on hackernews | 41 comments

luxpsycho | 18 hours ago

Owning a domain for 13 years before actually doing the project is the most relatable thing.

jonwinstanley | 14 hours ago

Hahaha I’ve recently been looking at a few domains I’ve owned forever too.

But do I really want to start more projects?!?

shermantanktop | 11 hours ago

If you don’t start new ones, will you really finish the unfinished ones? Really?

It’s ok to admit that the beginning is the most fun.

thisislife2 | 14 hours ago

And unfortunately also a smart move - it is so difficult to find a good domain name now because domain reselling has become such a huge business now. I wouldn't be surprised to find every word in the english dictionary is now a parked domain with ads, and a link to buy or bid for the domain.

mtford | 18 hours ago

Immediately eaten by a Pterodactyl... lol

alator21 | 17 hours ago

pretty fun

cfontes | 17 hours ago

Loved it

[OP] pawelwentpawel | 17 hours ago

Thank you! :)

BatmansMom | 16 hours ago

yeah i like it

jnellis | 16 hours ago

Doesn't seem to work in firefox. Probably my old pc. CPU pegged on chrome version.

[OP] pawelwentpawel | 16 hours ago

Firefox is my nemesis, will test thanks for letting me know!

jnellis | 14 hours ago

Here's the console output. It get's stuck at 72%... "painting or something" on progress bar.

THREE.BufferGeometry.toNonIndexed(): BufferGeometry is already non-indexed. 3mykc1x1fjgyq.js:5:331 WEBGL_debug_renderer_info is deprecated in Firefox and will be removed. Please use RENDERER. 1ydg98ua2yutx.js:2:5381 WebGL context was lost. 1ydg98ua2yutx.js:2:5532 THREE.WebGLRenderer: KHR_parallel_shader_compile extension not supported. 3mykc1x1fjgyq.js:5:331 Script terminated by timeout at: ld@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... L@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... lU/this.getUniforms@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... this.renderBufferDirect/y<@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... this.renderBufferDirect@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... i@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... i@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... i@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... i@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... i@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... l1/this.render@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... this.render@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:2... render@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:5... render@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:5... render@https://catcopter.com/_next/static/chunks/2d2hov5bowo-5.js:4... warm@https://catcopter.com/_next/static/chunks/0_l59d-9nj-se.js:2... 2d2hov5bowo-5.js:2319:8599

SwiftyBug | 16 hours ago

Works fine for me in Firefox.

gosen | 16 hours ago

It's pretty fun! I can see a lot of "AI-markers" in the assets, but these things can be improved over time. The concept and mechanics are quite cool, keep it going!

[OP] pawelwentpawel | 16 hours ago

Yep the assets were all generated, cat faces were the hardest one to get "right". Glad you had fun & thank you!

gosen | 14 hours ago

Building creative parts of games is actually the most difficult part with AI, it's usually very sloppy and I had to do many iterations to make it less "AI-looking" because AI can't be creative :D
Please add a full screen button for mobile!

[OP] pawelwentpawel | 16 hours ago

Roger that, thanks for feedback!

rishi_devan | 16 hours ago

Was a lot of fun. What's the server backend built in? NodeJS?

[OP] pawelwentpawel | 16 hours ago

I think I flew next to you haha, happy you liked it! Yep it's all Node.js + Websockets + Rapier, front-end is mostly Three.js

Fraterkes | 16 hours ago

Miss the days where these kinds of posts were a jumping off point for technical discussions about gamedev. Guess learning that people use a whole stack of LLMs for these kinds of projects now is also interesting.
I was never interested in gamedev, but I am interested in gameplay design.

GenAI lets me toy with gameplay design without having to first spend a lot of time mucking with code or assets.

Sydrik | 9 hours ago

I get it. While I have been coding since I was in school, if it takes too long to ship, the grand outcome is... no game.

Moving forward though, I hope that AI will be better integrated only in areas that it should be – like forming up logic, building proper scaffolding and infrastructure, debugging, optimizing code... and even when art is involved, I hope it evolves from GenAI to operating within human-operated graphics software. That said, I believe that GenAI does not create. It replicates or meshes together the already known. I hope us humans would rely on GenAI at its correct level.

But I am glad you produced this game – GenAI or not. If it is fun to play, it has done its work!

nextaccountic | 5 hours ago

> and even when art is involved, I hope it evolves from GenAI to operating within human-operated graphics software

People use such Artist-integrated tools since 2022. For example, Krita or Photoshop plugins etc. Not all AI art is just prompting until the model gets it mostly right

Fraterkes | 13 hours ago

I'm sorry if this came off as overly dismissive, I enjoy people posting stuff they're passionate about on hn, even if I don't necessarily like everything I see.

geooff_ | 15 hours ago

This is absolutely ridiculous. I love it.

[OP] pawelwentpawel | 15 hours ago

That is exactly what I aimed for, thank you!

avereveard | 15 hours ago

Popups popups everywhere
Would be cool if the default game mode changed when there were enough players; I think everyone goes into the catnip mode just because it is default, no one is ever in the other modes!

modinfo | 14 hours ago

This is fun and nice idea for a multiplayer game, but will be cool if you open sourced it. But, still good work.

throwitaway222 | 14 hours ago

OP: Keep your IP. Keep building it.

atakmim | 14 hours ago

I tried and played it, but I died so many times :) It's a lot of fun btw!

akman | 13 hours ago

Team Fortress for cats. Nice!

[OP] pawelwentpawel | 13 hours ago

I loved that game, glad you liked the cats too!

algorr | 13 hours ago

How were the cat’s movements such as its flight the motion of its wings or propeller and its head movements created? did the ai generate pre-made animation clips or are the movements calculated in realtime via code?

[OP] pawelwentpawel | 13 hours ago

They're not fully procedural - AI has rigged and created motion for the bodies. The propellers should have some motion blur too.

tracerbulletx | 13 hours ago

Was kind of hoping this would be more like SWAT Kats

andai | 12 hours ago

Fun game. It works on my phone too.

You said it took a week? Would love to hear more about the development and how it works, I've been struggling with a 2D browser game for a while (especially the netcode), there's so much that goes into it!

[OP] pawelwentpawel | 12 hours ago

Thanks! To respond to your questions - there is a lot indeed. I think the trick was reusing the same techniques I used before (materials, shaders, colours, light setups and much more) from my previous project (https://flat.social - spatial audio and video in 3d, much more complex). I reused a lot of already optimised elements from there and the general look & feel that took me quite a lot of time to arrive at.

Also lots of props to Opus 5.5 - it was incredibly good at getting the right game play feel from the start. Some of the quirks it came up with were actually quite funny (try swimming, it's annoying but cute). Ironically I suggest trying dropping large prompts that might be even slightly too vague. The first version of the pterodactyl was literally me saying something like "let's drop a pterodactyl there guarding an atomic bomb". It came up with a pretty good version of it which then I have later calibrated.

All together, it felt much more like an art direction task than a technical one (and I've been programming since I was 12).

RugnirViking | 10 hours ago

Very busy ui. Mmo levels of stuff vying for the players attention

Fizz43 | 7 hours ago

The core gameplay is so 'bad'. It looks and feels like a mobile game slop you'd see in a shady popup ad. The guns seen to have broken physics, the movement has input lag. I guess the idea of cat copters fighting is cool but there needs to be refinement to the core mechanics.

Maybe thats just the state of web games and they're all like this.