Dynamite Deka Extra credits: Play the Deep Scan game. A credit will be earned every two submarines destroyed. These credits will be transferred to the Dynamite Deka game. Extra Deep Scan submarines: Highlight the "Start" option for Deep Scan, hold X + Y + Z, then press Start. Fast Deep Scan submarines: Highlight the "Start" option for Deep Scan, hold X + Y + Z + B then press Start.