I am currently planning on creating a game that is platform based with tower defense and idle game mechanics. I haven't found any forums or such that clearly lists the limitations with GMS2. What I know so far: 1. GMS 2 has a hard time/cannot handle numbers higher than 2 billion. 2. GMS 2 also wasn't designed for 3D games and are hard to create with GMS2. 3. When it doesn't come to the above then it's limited to the developer. This is all I know. Thanks.