Every game developer studio these days has the DEX and the internal market for it's token. Like Gala has plenty of games each with it's own internal token which is mapped to the GALA token. And they do the internal token swap on the galaswap. When it comes to Gala network they have enough games that demands the DEX usage and also this would make the internal transaction lot faster instead of depending on the external chains for such type of the usage. 

If you happen to have a game token or wish to launch your own token on the Gala network you can also make use of the Gala token creation tool. This can be a good option for those developers and the managers who happen to manage those tokens. There is a video that you can check out how to create a new token. 

That being said, Galachain has been growing with new games and their respective tokens as well.  It would be a good option for you to check out the tokens that are already created and also it would be a good option for anyone to build on the same. I would recommend you to try out those token creation tool and you will definitely grow from there. 

You can check out Galaswap here.