The EBR 800 was the first gun I got from a rare box . with the nuke I ' m playing it everytime in hardcore and you can easy get a 250 with it . Sadly it ' s the only gun with nuclear i ' ve unlocked at all so I ' m playing only hardcore since release and I like it really much . <| sep |> There may be number of compatibility issues and studio is known to be far more optimized . If you are comfortable with Gamemaker 8 , just like Hotline Miami devs are still using Gamemaker 7 , that is fine . However , you will have nobody to help you if you run into issues . I highly recommend using Free version of Gamemaker Studio as most of the functions important functions aren ' t locked away . You cannot change your game ' s splash screen and testexport your games to LinuxMac , etc . . These aren ' t huge issues unless you want to actually publish your game .