Talk:Custom Game Engine/@comment-58.165.177.136-20130907015427/@comment-200.117.5.140-20181210181332

Those are features of the older versions of the game (Alpha versions). U had to research them and it costed a lot of RP. You could include them into your engine to make ur game a lil' better. But even in the late parts of the game you could make a good game without pheriperal support. So the devs removed it.