In this video I show you how to find the elusive viewmatrix. This should work for 99% of games. It relies on the fact that the up angle axis has to be between -1 and +1, and you find the variable by searching for those values in cheat engine.
Another good method is knowing the fact that all graphic related variables are probably declared in the same header file. For instance you know that your game resolution is 800x600. Find where your resolution is stored and search around that memory address for other related variables. You can use any starting point, FOV, resolution, etc...You can then use "What Accesses this address" to find functions that access your FOV or resolution and perhaps they also access the view matrix. Trial and error is big in reversing, especially if you don't have alot of experience.
I hope to add more examples to this tutorial as I hack more games