The client-server model is a centralized computing model where one node (the server) performs some service for other nodes (the clients).

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How to synchronize events to clients?

I need to keep the client updated on data that's rarely changed (like health) or when an event occurs (like when a player is attacked and should have "-10 hp" above him). Those 2 specific part should ...
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1answer
97 views

MMO - Boss Action Distribution

I was considering how MMO mechanics work and especially how NPC/mob decisions are calculated and distributed among players. Say for example that you have a team of 5 fighting a boss. The boss's ...
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2answers
435 views

Networking with UDP, should I keep sockets open on the server

I am working on making a 2D platforming game that will have multiplayer functionality. Over the last few days, I have done a lot of reading regarding how to deal with the networking, and believe that ...
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2answers
136 views

Do I need TCP socket?

My game uses UDP sockets to stream updates between server and client and I've also made a reliable channel that resends messages if there's no response and makes sure same message isn't processed ...
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3answers
4k views

Why does editing the client's memory in some MMOs allow them to cheat?

Why editing the memory of the game client works? Why so many "Hack protection" tools coming with the clients? If I were to design a client-server game, everything would happen at the server (the ...
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3answers
678 views

How can one add a level to an already published ios/android unity3D game on a daily basis?

How can one add a level to an already published iOS/Android Unity3D game on a daily/weekly basis? I know this probably isn't feasible but it won't harm if I just made sure of it. Our game requires to ...
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0answers
76 views

Security-minded design patterns / paradigm for client/server application

I am working on a client/server application and am starting to take it from proof-of-concept to actual implementation. The client is an Android application and the server is in PHP. In similar ...
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1answer
3k views

Why will my server not execute a command sent by the client in Unity 5.1?

I'm working on a very simple/basic client-server networking program, the basis of a future game I hope to create. Now the client program/project DOES successfully connect with the 'server ...
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5answers
1k views

Authentication between client, central server, and player ran server

I am developing an open source game that uses a client-server scheme similar to Minecraft. We will control the central authentication server that verifies an account is valid, while players will run ...
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1answer
568 views

Packet size vs packet frequency

I am making a multiplayer game in Java that uses a client-server model, where all important decisions are made by the server and communicated to all clients over UDP. Currently the clients and the ...
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1answer
80 views

Validating User Actions on the Server

I am currently working on a networked first person shooter. I have created a server implementation that can synchronize player data. But while implementing a damage system, I realized that I almost ...
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4answers
348 views

Is there any way to verify the GPS location data received from client?

The answer to this question may be "NO" but it's quite important so I think I might as well ask. This should be a problem for all client-server location-aware games where player locations in the ...
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3answers
668 views

Game Networking: Client request or Server Sending

I'm trying to implement a basic client-server setup for my game. But what confused me was how I would approach sending updates. Would I do: Server has a tickrate, let's say at 20ms. Each tick would ...
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1answer
356 views

How do I create a multiplayer server also suitable for local single-player?

I've created a voxel game in C++, OpenGL and SFML, and I want to make it multiplayer. I'd like to make it similar to Minecraft's client-server model: The single-player is just a client to the hidden ...
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1answer
128 views

Client-server architecture with box2d

I am running a client-server architecture with an authoritative server running box2d and the client running box2d as well. If gravity is set to 0, is there any point to linear interpolation and ...
0
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1answer
147 views

How to implement server side auto attack?

I'm writing a basic MMORPG and im trying to implement auto attack. At client side I send an AutoAttackMessage to the server. Should I send this message every X ms to the server, or juste one time ...
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2answers
124 views

Client Tells Server What Gamestate Data to Send Back

I'm just stepping into the world of MMORPGs and how they function, so assume I know very little. in a game, a client doesn't see everything that the server does. For example, the client can't see ...
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0answers
45 views

How to deal with cheat avoidance and trusted client issue [duplicate]

I hope not to be off-topic here. At the moment I'm dealing with networking programming for the game I'm working on and I found different possible scenarios. I started to build code using a Platform ...
8
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2answers
1k views

How to keep server-client clocks in-sync for precision networked games like Quake 3?

I'm working on a 2D top-down-shooter and doing my best to copy concepts used in networked games like Quake 3. I have an authorative server. The server sends snapshots to clients. Snapshots contain a ...
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1answer
273 views

Client-Server Game Communication (w/ Protobuf, Relevancy and Delta Compression)

So, I have reached another problem while trying to implement my client-server communication. From everything I've read there are three main ways to minimize packet size: Only send what has changed ...
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1answer
71 views

Application components dependancy and decoupling

In my client application I have two major components: GameCore - wrapper that handles everything about running the actual game NetworkClient - A layer that takes care of ...
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1answer
291 views

Should I switch to UDP for a mobile p2p game when considering 3G network?

I have been making a mobile game that is similar to "Street Fighter" where two players play with each other via Internet. The game sends out a small packet (controller status) to the other party ...
3
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0answers
163 views

client-server network model for top-down WASD game [closed]

I'm currently working on a multiplayer game with top-down camera view and WASD player control, similar to Bloodline Champions. Projectiles, spawned by players are relatively slow and clearly visible, ...
2
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1answer
275 views

Is there a pattern for handling multiple game states?

I'm experimenting with writing a multiplayer game, almost from scratch (I'm using C++, OpenGL, ENet, and platform-specific APIs) with a client/server networking model where the server is ...
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3answers
310 views

Is it worth it to encrypt data?

I am using Java to write a moderately simple video game and I need to transfer some large files (edit: Live game data and possibly assets.) between the client and the server. I need to decide whether ...
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3answers
272 views

How do I resolve asynchronous client actions against an authoritative server state?

I have a multiplayer card game which I am in the process of developing. The game is relatively simple; players have a certain number of cards which they can activate, sell, or use in various other ...
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2answers
179 views

Using peer to peer for prediction in a client-server network model

By implementing peer to peer connections between clients in a client-server network model I should be able to increase the prediction fidelity as this theoretically would provide the client with other ...
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4answers
3k views

Should a socket server and game server be separate processes?

Assume a simple standard client/server game. For the server, is it worthwhile to have a separate process that listens for connections and messages from clients and sends the data via local sockets or ...
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1answer
175 views

Does compressing data before transfer make a game run faster?

I want to make my game as fast as possible as it is real time and fast paced. I have already decided to encrypt my data here and I was wondering whether compressing it would be faster for the client ...
6
votes
3answers
137 views

Player acceleration formula and using it with authoritative server

I know the theory behind authoritative client-server architecture, it works very well for character movement in a tile-based world: you send messages like "I moved one square to the right", the server ...
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2answers
1k views

How to handle realtime random movement with client side prediction

I'm building a realtime multiplayer game that runs the same 'physics' loop on client and server. I'm using a steering behavior 'wander' that is essential random movement. The client and server ...
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1answer
49 views

Device and user progression conflicts

Im designing a game with both digital currency and player progression, but have hit a confusing snag, where I possibly can't be the first to come to a decent solution. To keep it simple, it's a ...
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1answer
268 views

Server to client update rate

I am building a game that uses client-server architecture and have the following question regarding server to client updates. Currently the server is doing 60 ticks per second and is sending updates ...
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2answers
650 views

How should I store game data in a game server?

I'm new to game server development. I'm facing this issue: I want to develop a card game server, but I'm not sure about the solution to hold the game data while playing. Example: In a poker game, ...
3
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2answers
3k views

MMO Client / Server Architecture (NoSQL)

The main aim is to keep the games variables server-side for obvious security reasons. I believe having server-side code to check before updating the games database values will protect me from classic ...
5
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1answer
872 views

Running multiple box2D world objects on a server

I'm creating a multiplayer game using LibGdx (with Box2d) and Kryonet. Since this is the first time I work on multiplayer games, I read a bit about server - client implementations, and it turns out ...
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1answer
240 views

Multiplayer and creeps (NPC enemies): how to compute bullet hits given the lag?

We are making a multiplayer co-op game, where players will shoot not each other but AI enemies (creeps), controlled by the game. The chosen implementation is client-server with an authoritative ...
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1answer
218 views

Why is there a huge update-delay in my client/server code?

I'm working on my Java game with Libgdx and having trouble with the network code. I can create a server, make multiple clients connect to it, but there is a huge delay between the player's input and ...
2
votes
1answer
185 views

How to sync gamestate between server and clients in turn based 4x game?

Background information: I am developing a game similar to other 4x games like Sots, MoO,... I am storing all information about the game(like star/planet/ship/fleet positions, owners and a lot of ...
5
votes
3answers
4k views

How do I handle packet loss in a client-server network model?

In a client-server network model, the clients only send commands to the server (i.e. coordinates of a click, fire gun, etc.) and the server then runs those commands to produce a game state. But what ...
0
votes
2answers
75 views

Can the different computation power in a multi-player game affect each player's performance?

In case an RTS game allows the clients to perform some calculations such as path-finding after the player clicks the map for a destination, and taking into account the game should be synchronised for ...
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1answer
253 views

Human vs human android chess game design [closed]

First of all I am total amateur in game development and sorry for my poor English. I want to make android human vs human chess game. So I am wondering how to design it? scenario 1: User connect to ...
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votes
1answer
1k views

How to set up a client-server architecture for a browser based game [closed]

I'm really curious about how to set up a game so like Hayday or Clash Of Clans, especially with regards towards the server-client architecture. How does one set up such an artitecture? What are the ...
0
votes
3answers
431 views

Handling packet impersonating in client-server model online game

I am designing a server-client model game library/engine. How do I, and should I even bother to handle frequent update packet possible impersonating? In my current design anyone could copy a packet ...
2
votes
1answer
352 views

Online RTS Game Architecture for Mobiles [closed]

We came up with an idea for a real-time strategy game for mobile devices that can play with other players over a network. I'm trying to plan out the architecture/protocol required for such as system. ...
1
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1answer
974 views

php multiplayer game - server&client model

I'm working on a simple round&web-based multiplayer game. The idea of the game is very simple: The players get an array of audio files which they listen to and write the transcripts for in 5 ...
3
votes
1answer
172 views

game mod security question

So I'm in the process of building a game in C++ for the engine and Python for behavior and moddability. One of the planned major features is that when the game client connects to a game server with ...
19
votes
2answers
4k views

What to send to server in real time FPS game?

What is the right way to tell the position of our local player to the server? Some documents say that it is better to send the inputs whenever they are produced. And some documents say the client ...
0
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1answer
216 views

How to solve problems with movement in simple tile based multiplayer game?

I'm making a simple tile based 2D multiplayer game in JavaScript using socket.io where you can move one tile every 200 ms. The two solutions I've tried are as follows: The client sends "walk one ...
2
votes
2answers
95 views

Managing past/present game state

I'm not sure if "game state" is the correct term, as my searching shows me a lot of results that are not relevant to my question. When I say "game state", I'm talking about the internal state of the ...