when ZED enter the wrong room,Film & Animation,dead space,issac,gordon freeman,gordon,doom,doomguy,doomslayer,zed,killing floor,kf2,master chief,halo,halo2,halo3,ost :
Halo OST - Original Halo Theme
Half life ost
Doom Eternal OST - Only Thing they Fear is You (Mick Gordon)
Twinkle Twinkle