Do you want to be the best in your favorite game? Never stop training!C-4 enhances players' skills making them superior to their opponents;You don't need to leave your favorite game to practice with it;Runs on top of any game using "Full Screen Windowed" mode;Can be minimized anytime by pressing "Esc".Launch C-4 and then your favorite game;(favorite game should be in "Full Screen Windowed" mode)Enable "Play Audio When Game In Background" in your favorite game;(enable developer console and type snd_mute_losefocus #)Increase the background FPS limit of your favorite game;(enable developer console and type engine_no_focus_sleep 0)C-4 has no impact on the players' performance, nor record data or tamper with game settings files.