The U-Octa is a tier 5 ship in the U-Series mod. It's a better version of the U-Center. This is an excellent miner and attacker! This ship fires a total of 8 bullets in every direction, or in one direction, depending on how you choose to upgrade. But like all the other miners, it's pretty slow, very bulky, and has a ton of mass. But its health lets it survive and defeat the U-Siege and U-Marksman.
This ship is OP. If you upgrade Damage 4 or 5 times and do not upgrade Energy Regen, only the front laser will shoot when energy is low. This makes it like a U-Fusion with low energy cap, same shield regen, more DPS (sustained 250 damage/second), and more agility, but in Tier 5. Mathematically, you should be able to max Damage and upgrade Energy Regen once for 270 damage/second, but if you do that, other cannons will shoot, which is unexpected. Also, upgrading Damage 4 times doesn't seem to be enough.
Like the U-Center, it's vulnerable to and loses to speedsters but shreds them if they make a small mistake. It's also vulnerable to the U-Arsenal's high burst damage with recoil. As long as this ship has enough health (from either shield or gems), any enemy with low energy (except speedsters) is basically a free kill, since you can damage them faster than they can damage you, and the stream of pulses can also help stunlock them.