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.