Firstly, add a custom game to the WTFast client. Do this by clicking "Custom Games" and then the "Add" button.
You will need to enable custom games in settings if its not alrealdy enabled.

2nd step: Once youve opened the config screen name it what you want. (Probrably "Stick Fight:The Game" or something similar.) Then in a box where it says "Game executable file", paste this text into it wthout qwotes "C:\Program Files (x86)\Steam\steamapps\common\StickFightTheGame\StickFight.exe".

NOW clicking "Okay" and running the game wont work. The game will launch but steam services (aka multiplayer) will not work as it wasnt launched by steam. To fix this, click "Launch from browser (URL)" and then in the box below it paste this text without qwotes "steam://rungameid/674940".


If your screen looks like this (other than a different name for the first box) you did everything right.
Click ok and have fun.
The config should save so you shouldnt need to do this again.

(THIS MIGHT NOT WORK ON STEAM GAMES THAT ISTALL THEIR OWN LAUNCHER. EX: Trove)

Do step 1 on the previous tutorial to open up the config menu. Once you have done that, type in the games name to the "Name" box. Click the browse button and navigate to the steam games exe file. If you dont know where to look then goto your steam library, right click the game you are trying to set up, click properties, click the Local Files tab and lastly click browse local files. This should help you find the filepath.

Once youve done that and the filepath appears in the seccond box, click "Launch from browser (URL)". Now you need to find the url. To do this, go back to your steam library, right click the game again, click properties, and now click "Add shortcut to desktop". Now go to your desktop and right click the new shortcut. You should see a dialouge like this:Copy the text in the box next to the word "URL" and go back to the config menu in WTFast. (just go back to the client. It should alrealdy be on the config menu.) Paste the text that you just copied into the box with the words "Launcher URL". After that click ok and have fun!

I cannot guarentee this will work for every game but it should work with a lot of games.