Ever wondered what it feels like to ride around on the inside of a disco ball? <i>N2O: Nitrous Oxide</i> offers a sickeningly effective approximation, letting players pilot a Tunnel Runner ship through levels that mainly consist of twisty tubes with psychedelic light patterns flashing on the walls. <p><i>N2O</i> is one of those old-school games that left us shaking our heads after our first pathetic attempt to successfully navigate the tunnels. The enemies just seemed too fast and too numerous. After an ho...