Mr. Driller Online had the potential to be a brilliant addition to Xbox Live Arcade. The game plays just as well as previous entries in the series, with fun, strategic gameplay combined with bouncy music and animation. Unfortunately, it all comes to a screeching halt the second you try to include a friend. The Online portion doesn't work whatsoever, with enough glitches and system freezes to make you think that your Xbox 360 is dying. Namco Bandai needs to patch this ASAP.