800 Fathoms (older)

Mastering 800 Fathoms (older) requires an understanding of its unique mechanics, which differ significantly from the more common later revision of the game. First, start with the basics: the arcade control setup uses a joystick for horizontal movement along the seabed and one fire button to launch torpedoes upward. The most critical rule for new players is to never stay stationary. Unlike the later build, depth charges in 800 Fathoms (older) track your current position when dropped, so holding still guarantees a hit. As soon as you see a destroyer mark your position with a surface shadow, immediately move horizontally to a new position to avoid the incoming blast. Next, prioritize targets strategically. Small patrol boats are only worth 50 points, while large battleships and aircraft carriers award 500+ points for a single sink. Focus on large targets first in early levels to build your score quickly, but always keep an eye on the top of the screen for diving enemy aircraft. Enemy aircraft can one-hit kill you if they collide with your submarine, so move out of their path as soon as you see them start their dive. Avoid the common mistake of spamming the fire button. 800 Fathoms (older) has a short but noticeable torpedo cooldown, so firing too quickly will leave you defenseless when a new high-value target crosses your path. Wait for a clear, centered line of sight on a target’s hull before firing, and you will rarely waste a shot. As you advance to higher levels, enemy spawn rates increase and movement speeds get faster. Stick close to the edges of the screen during these stages: enemies tend to cluster in the center, so staying on the edge gives you extra reaction time to dodge depth charges and aircraft. Follow these tips, and you will quickly improve your score and survive far longer in this challenging retro arcade classic.