I like GG.
I have tried Unity and Timberland, or whatever it's called.
Both are a pain in the ass to use. Far to complicated for part time users like me to spend valuable free time on. Plus they are very buggy on PC.
To get the really high quality graphics for both then either buy premium models costing $100s each or make them yourself, whch takes around 3 month for a fully rendered 4 appartment house.
Chacter AI scripts, forget it. GG is a million miles in front of them both for off the shelf scripts.
What these other platforms provide is dedicated team work that can produce AAA work.
GG can't do that at the same level in 2016. But the graphics that GG can produce is very good. In the tunnel and sewer models on the Store, these are as good as what UNITY and TL can produce, almost, but they are very acceptable in any PC game. Because they are a confined visual, ie a tunnel, with good lighting and atmosphere, awesome stuff.
Some of the work that I have seem on youtube from UNITY and all other game engines are not even as good as what GG produces. The way that trees, plants and grass move with the wind is just so so bad. I like the way that GG plants move, They look natural.
The buildings and scenery is flat, the AI script activation and related animations are sad adverts for the engines they were created on. But these are people using these engines as a one man team and the output is bad. GG with one man teams produce first class graphics with awesome lighting. GG can produce the game for visual pleasing.
It then comes down to FPS. That game reviewed by JIM on youtube, that was just bad game design. The demo level I made with over 40 Ai characters still works well at 25 fps. It's all down to game design. The fps drops every time the player moves in the scene, which means that the scene has to be re drawn. The buildings have to re-done.
Solution, don't mix lots of characters with lots of re-rendering. USE Lightmaps. Cut down on pollys. Out of all the games I have played, which is hundreds, I couldnt tell you what a scene looks like when I am shooting the baddies. The scenery is not the focus of game creation, it is the player interaction. For evidance of this just look at No Mans Sky, Civilization 6, Minecraft, LEGO, Engineers, and many many more.
So why do I like GG.
Becasue it is fast to produce intricate player interaction games. And when I want high level detal, like at the end of a shootout or the begining, up the graphics details, this is the main parts of a game that gets noticed the most.
GG can only improve. And every little change all helps to make the interaction between player and the game much better.
(Custom) Intel i7 3.3 Mhz. 16 GB fast ram. EVGA Nvidia 560 Ti 4GB. Dell US27 2560 x 1440. AOC 24 1920 x 1080. Awesome.
Next G. Card EVGA GeForce GTX 970 Superclocked ACX 2.0 Gaming 4GB GDDR5 PCIe3.0 Graphics Card.
Would Like EVGA NVIDIA GeForce GTX 1080 8GB GDDR5X PCIe3.0 Graphics Card