Gmoney and Aphrodite , thanks for the help so far!
I have a theory, but I need to test it: could you try running/testing the game as normal 4 times, and check if each of them is laggy or not, and at what instances do they become laggy (being spotted, moving, opening/closing door, etc). Then, run/test the game again but with every/most program(s) closed. Then, revert the program to any previous version (ie r227) and redo the two tests again. Please do post the results when you have done so, and any other users can help out too!
Thanks in advance!
You're welcome, JDebstup.
Here are my test results.
Normal - R233
First play - No lag
Second play - No lag
Third play - Laggy after encountering an emeny shotgunner. The lag didn't go away after the initial encounter.
Fourth play - No lag
Lite - R233
First play - Game became laggy after I put shotgunner at the first door and moved up and down to dodge bullets.
Second play - No lag
Third play - No lag
Fourth play - No lag
Tried it on R277, but the file won't open, because it was made for R233.