Depending on the game you are trying to create here’s a general kinda guess I would say you need for a game.
- A concept/idea for the game you want to make. This is at the top because this it decides a lot about the game, like what kind of engine to use and the skills necessary to make the the game, like will the game be 2D or 3D? And so forth.
- An animator/modeler. If the game is 3D you need someone with experience with a 3D program, you can’t have a game without the character and stuff right.
- A programmer. Some people think you can make a game without programming personally I disagree there is a lot more then just telling the characters how and when to move to be done with programming, like with your game you might need servers, websites, a way to update content, is the game offline or online if people need to connect how will they connect? Servers, networks, peer to peer, hosted by someone, etc a programmer comes in handy in many areas.
- A 2D artist for concept art it’s hard to explain to someone how you want something to look just with words its good to have some drawn images to demonstrate.
- A sound designer someone needs to handle sound effects, music, and your audio needs in a game.
Now depending on the size of your team or how many people will be working on the game some people might have to handle more then one job if you have 3 people likely someone will also have to take on additional task like sound, marketing or something.
There is a lot of smaller over looked jobs in making games like how are you gonna market the game like get the name out there to people? Who’s gonna do the sound? Where will I get the servers needed to host it if it’s an online game.