Endel Dreyer - Colyseus Multiplayer Framework | Made With Defold Jam 2025 — Transcript

Full transcript

1. 0:00Hello. At Made with Def Jam 2025, we
2. 0:04hosted Enel Dreer, the creator of
3. 0:07Kissios, the multiplayer framework that
4. 0:10is suitable to make multiplayer games in
5. 0:12default. Together with Endel, I also
6. 0:15created an example of a realtime
7. 0:17multiplayer game made with Default and
8. 0:20Kissios. So, check it out. And
9. 0:22meanwhile, I invite you to check out the
10. 0:25recording of the talk by Andel.
11. 0:28>> All righty. I think my presentation can
12. 0:30collaborate a bit with the crazy games
13. 0:32guys because as they mentioned very well
14. 0:35like the multiplayer games tend to have
15. 0:37a long tail and perhaps more engagement
16. 0:40sometimes. So I'm going to talk about
17. 0:43Kicus that is an open- source uh
18. 0:46multiplayer framework. It won't be very
19. 0:49technical. Uh it's mostly I'll show a
20. 0:52bunch of nice games that I was uh
21. 0:55gathering yesterday. Like uh I was
22. 0:57really excited gathering a lot of games
23. 0:59made with Cicius and perhaps my
24. 1:01presentation got too big. It's uh but
25. 1:03I'll try to skip some slides real quick
26. 1:06cuz I got like 35 slides. Most of them
27. 1:09are cool games made with Kicis. And at
28. 1:12the very end there's uh some demos with
29. 1:16the default engine. And one Pavl the one
30. 1:20of the organizers here was very nice of
31. 1:22him to make the port of that example. So
32. 1:26really thanks to him. So starting well
33. 1:28if you don't know the framework highly
34. 1:30recommend checking out the uh website to
35. 1:33learn more. It has rooms uh built in is
36. 1:37really the core of the framework is
37. 1:39rooms for any connection to be made from
38. 1:43clients to the server is through rooms.
39. 1:46Matchmaking clients into rooms very
40. 1:49custom uh synchronizable data structures
41. 1:52which is called uh schema. Yeah, I I
42. 1:55think this past year I've been working
43. 1:57on schema. Mostly all of my time was
44. 2:00dedicated to the latest version of
45. 2:02schema. It's really uh it's crazy stuff
46. 2:05going on there and it's the majority of
47. 2:08bugs also comes from schema. So, but
48. 2:10yeah, we we try to keep it uh as bug
49. 2:14free as possible and more recently uh
50. 2:17authentication. Yeah, I won't go too
51. 2:19much on on code, but basically you would
52. 2:23define a room in the server and you
53. 2:26expose that room for the SDK. So here
54. 2:30there's uh also a filter by it means you
55. 2:35could have the the client dictating
56. 2:37which room he's going to be uh directed
57. 2:40to. So if you the client provides the
58. 2:43code a specific code then it will go to
59. 2:46that specific room for the uh default
60. 2:49integration this is the boiler plate for
61. 2:52connecting with the room. So you provide
62. 2:55that identifier that was declared in the
63. 2:57server and basically you have a room
64. 3:00connection and you can send data,
65. 3:02receive data and listen to the state
66. 3:05callbacks that the server has uh because
67. 3:09yeah the basically the server mutates
68. 3:12the state and then you receive the state
69. 3:15on the client side and uh this is a
70. 3:19diagram of a more complicated scenario.
71. 3:22So basically a single process can handle
72. 3:25multiple rooms and rooms are tied to a
73. 3:29specific process and the clients
74. 3:32necessarily connect directly to the
75. 3:34process and the machine that those rooms
76. 3:38live in. So generally one server can
77. 3:42handle a lot of load like a single
78. 3:45instance generally can handle like from
79. 3:49500
80. 3:50to 3,000. It depends on how uh how heavy
81. 3:55your logic is and how much traffic your
82. 3:59server is handling. traffic in the terms
83. 4:02of messages. On this diagram, it's
84. 4:04basically saying how the connection is
85. 4:07established for a particular client with
86. 4:11a particular server and it could be also
87. 4:14a single server. So this diagram could
88. 4:17be represent either a single server with
89. 4:20multiple processes or multiple servers
90. 4:24with also multiple processes. So
91. 4:26necessarily you would have single uh
92. 4:29load balancer which can be more
93. 4:31instances of a load balancer and on kus
94. 4:35you have two requests. So the first
95. 4:37request you ask for a room you receive
96. 4:40the data where the that room is and then
97. 4:43you can connect directly to that room
98. 4:47that you are asking for. Uh this is a
99. 4:49real example of a single instance uh
100. 4:52handling to 500 connections. This is the
101. 4:55limit for this particular game cuz uh
102. 4:58it's already uh very high in CPU. So if
103. 5:01you need to scale more than this, you
104. 5:03need uh you will need more machines.
105. 5:06This game already is handling multiple
106. 5:09rooms, then you can scale easily.
107. 5:12there's a big problem that is unsolvable
108. 5:14right now. That is if you have only a
109. 5:17small amount of rooms or let's say one
110. 5:20big room. It's really impossible to
111. 5:22scale cuz you really need to be able to
112. 5:24separate those clients into multiple
113. 5:27rooms to be able to distribute these
114. 5:30rooms across many uh machines or
115. 5:32processes. This is new on the latest
116. 5:36version. uh there was a big problem uh
117. 5:39since the latest version that all state
118. 5:43data all the schemas are uh visible uh
119. 5:46globally. So you couldn't really have a
120. 5:50way to uh have particular clients be
121. 5:54aware of just a small amount of data
122. 5:57either for security or for optimization
123. 6:00as this is new also uh I've been fixing
124. 6:02bugs about this until like past month
125. 6:06hopefully now I mean I it's I can't say
126. 6:09bug free but hopefully it works better
127. 6:12than it used to but yeah I'm always
128. 6:14looking out for fixing any issues that
129. 6:18have with the latest versions. So yeah,
130. 6:20I I'll go briefly how you can specify
131. 6:24specific parts of the state to be
132. 6:26visible for specific clients. The
133. 6:29scenario of a card game, you usually
134. 6:31only you would be able to see your own
135. 6:33cards. It's fine for other players to
136. 6:36know the number of cards you have. I
137. 6:39mean, this example doesn't cover the
138. 6:41scenario of like users not knowing the
139. 6:44amount of cards. So here the view tag is
140. 6:48being used on both the suit and number
141. 6:51fields. All the other fields are visible
142. 6:54to all players. For you to use the state
143. 6:57view, you need to first assign the
144. 7:00create an instance of the state view for
145. 7:02a particular client. It's special
146. 7:04keyword like client.view only accepts a
147. 7:07state view. On this piece of code is a
148. 7:09bit implicit, but this state.cards cards
149. 7:14has the all the cards in the game and
150. 7:18the server is expecting a discard
151. 7:21message here that says that that card
152. 7:24was played and then it adds that card to
153. 7:27everyone else's state view. And if you
154. 7:30need to remove you you need to do that
155. 7:32manually as well. So you need to iterate
156. 7:34over the state views and remove that
157. 7:38item from the state views or you can
158. 7:40remove the item completely from the
159. 7:41state. So it's a new thing. It's I'm
160. 7:44getting feedback and trying to improve.
161. 7:47This approach is being easier to
162. 7:50maintain and easier to to evolve as the
163. 7:54previous approach that was with filters
164. 7:56and it was crazy. I don't even want to
165. 7:59remember about that. So yeah. Yeah. I'm
166. 8:02going to show some cool games made with
167. 8:05the very first one I I can't not say
168. 8:07about this. It's a really old news, but
169. 8:10the guys from uh Tiny Dobbins made this
170. 8:13game. I I helped them make the server.
171. 8:16It was the reason why the default SDK
172. 8:20exists today. So, we made the default
173. 8:23SDK back then in 2019.
174. 8:27And since then, we've been me and the
175. 8:30community improving the default SDK and
176. 8:33keeping it up to date with the latest
177. 8:35versions of the framework. It's very
178. 8:37basic a physics based game etc. All
179. 8:40right. Next. It's kind of platform. It's
180. 8:43not only a game. They have uh multiple
181. 8:48small games inside this blocks platform.
182. 8:52I mean right now the those parkour games
183. 8:55are really taking off. There are so many
184. 8:57of them. But I think they were one of
185. 8:59the first to release a parkour game on
186. 9:02the web. And after the success of that
187. 9:05parkour game, Arthur, the author of this
188. 9:08game, decided to go next level and they
189. 9:11released game after game and started
190. 9:14really small as an indie and now I think
191. 9:17he has a team of I don't know how many
192. 9:19members, but yeah, it started as indie
193. 9:22and now he is building a company on top
194. 9:24of this game. Emolingo is also doing
195. 9:28really well. They all their games
196. 9:30currently uh use Keskis. They kind of
197. 9:33build their own framework on top of it
198. 9:35cuz I think they use play canvas right
199. 9:37now. Yeah, they are non-stop releasing
200. 9:40games game after after game for 3 years
201. 9:42I think and they're performing really
202. 9:45well as well. Simply up is from Elander
203. 9:49Studios from Leonidas. They are also
204. 9:52building a portfolio of games. They have
205. 9:55been using uh Kesus for a few years and
206. 9:58sometimes he offers a connected world uh
207. 10:02online classes using play canvas and
208. 10:04kicus. It's just uh really really cool
209. 10:07to see uh make it meme also started as
210. 10:11uh indie and now they are a company. I
211. 10:14think they they managed to get this big
212. 10:17from co times. So, everybody wanted to
213. 10:20have some fun and it's basically a place
214. 10:23where you gather together and make some
215. 10:26memes and laugh at memes. Uh, right now
216. 10:29you can also play from mobile. So, you
217. 10:32in person you could like gather with a
218. 10:34group of friends and start uh making
219. 10:38memes and just having a good time. More
220. 10:42recently, Legend Games started adopting
221. 10:46as well. I think they have two games
222. 10:48released right now and a really talented
223. 10:51team. I mean at pulling off a I don't
224. 10:54know how to pull off a FPS game. It's
225. 10:56really for me it's really complicated
226. 10:58and yeah this is also really cool cuz
227. 11:00they managed to get on the top action
228. 11:04game on Discord activities. So if you go
229. 11:07to to launch a discord activity and you
230. 11:10scroll to the action game section is
231. 11:13there. Discord activities is kind of new
232. 11:16thing and it's another platform to
233. 11:19consider for web. I I really love on
234. 11:22Rush Studio they their attention to
235. 11:24detail is really it's really cool. They
236. 11:27also recently started adopting uh Kicus
237. 11:30for a few of their games not their big
238. 11:32games. I think they have multiple modes
239. 11:35as well inside the game itself. I wasn't
240. 11:37aware of that many people joining
241. 11:40together these games. So it's really
242. 11:42fun. Similarly, On Rush also released a
243. 11:45fishing game. And I think it also has
244. 11:48some small mini games on it. And another
245. 11:52thing that On Rush does really well is
246. 11:54their mobile support. So, this game is
247. 11:56running on mobile. This is a new one.
248. 11:59It's this is an unreleased game. All the
249. 12:02games that I've I've mentioned
250. 12:03previously were released in production
251. 12:06games. Uh this one is not in production
252. 12:08yet, but I think it's going to do really
253. 12:11well. They they are on wish list on
254. 12:14Steam right now and they made it using
255. 12:17uh construct tree if I'm correct. Uh,
256. 12:19another one is from
257. 12:23team flow on the audience also.
258. 12:25Similarly, they uh it's not fully
259. 12:27released if I'm right. I think it's uh
260. 12:30on online on beta and also a small clip.
261. 12:35I'll play here. They have a 25 versus 25
262. 12:38mode. And I think there's some uh
263. 12:41something that you do that affects other
264. 12:43screen and it's a crazy mode inside. Of
265. 12:47course, they have a single player mode.
266. 12:49uh that you progress over like a map or
267. 12:51something. Cool. So, this is their Steam
268. 12:54page. Yeah. So, the next slide, big
269. 12:57disclaimer. I know a lot of people don't
270. 12:59like crypto or they're not big fan of
271. 13:01crypto, but yeah, a lot of crypto games,
272. 13:05they choose Cicius because it's it's
273. 13:07free and easy to host. And it's nice
274. 13:09that a lot of them uh use it and help.
275. 13:12Yeah, by using and also reporting any
276. 13:16issues basically grows the framework and
277. 13:18most of them run on the Ronin chain. I
278. 13:21don't understand much of the crypto
279. 13:22world. So I'm just sharing cuz it's uh
280. 13:25interesting to see perhaps there there
281. 13:27is something to be explored on the
282. 13:29crypto space. I personally don't don't
283. 13:33know much about it and just observe and
284. 13:35see. Um all righty I think that's it for
285. 13:39the games. Cool. So now perhaps less
286. 13:43exciting cuz the games are really cool.
287. 13:45The demos one is not new as well. It's
288. 13:49this small tic-tac-toe turnbased
289. 13:52two-player shared experience. It was
290. 13:55supported by Salem a few years ago. I
291. 13:58think seven years ago, but we we still
292. 14:01keep it updated. There's the source code
293. 14:03available on GitHub and more recently
294. 14:07this was ported by Pavl himself and
295. 14:11yesterday we put it online and it only
296. 14:15works on desktop. It doesn't work on
297. 14:18mobile. If you can you will see a small
298. 14:23arrow at the bottom that then you click
299. 14:25on that arrow you click connect and then
300. 14:29you click join or create. So yeah, this
301. 14:32is still under development. I think uh I
302. 14:34think Babel wants to do some
303. 14:36improvements on this. It is made off the
304. 14:39phot example made by Por. He made for
305. 14:43the native phot plugin and we parted I
306. 14:48mean Pavo ported to use Kicis. So it's
307. 14:51really cool. I think Bejorn wants to
308. 14:53make this like go-to example for any uh
309. 14:57multiplayer provider for default. So,
310. 15:01Kicus is all about open source.
311. 15:03Everything is MIT licensed. The server,
312. 15:06the SDKs, it's all open. So far, I run a
313. 15:10script. Uh, and so far we had 160
314. 15:14contributors of code directly across all
315. 15:16repositories. Of course, there's more on
316. 15:19the community like answering questions
317. 15:21or interacting or reporting bugs is
318. 15:23really important as well. Like to to to
319. 15:26report a high quality to have a high
320. 15:28quality report of a bug is really
321. 15:30valuable and this is not accounted here.
322. 15:32I think that's the most value of open
323. 15:34source is having like this interactions
324. 15:38with people and with the intent of
325. 15:40growing and stabilizing things on the
326. 15:43framework. It's close to an end. A
327. 15:45special thanks to all the sponsors for
328. 15:48Kesis that is blocks. Uh Pocky and Zerox
329. 15:51N is like a consulting company for
330. 15:54crypto and yeah Pocky you probably know
331. 15:56and blocks I showed their game to all
332. 15:59the individuals support as well. And
333. 16:02that's it for the talk. I hope you
334. 16:04enjoyed it. Thanks a lot for having me.
335. 16:06I'm really glad to participate and yeah
336. 16:09of course you can ping me send me a
337. 16:11message on Discord on uh Twitter X
338. 16:13whatever. Yeah, I'm happy to talk to
339. 16:15you.