0.4 changes
Added 13 items: the Blade Hook, High-Tech Yoyo, Aeromine Launcher, Mana Battery, Engineer's Wrench, Blade Array, Water Spear, Ocean's Fury, Disruption Sceptre, Oceanic Lockdown, Lapis Lazuli, Mysterious Remote, and The Banisher.
Added 1 Event: Robot Invasion, containing Invader Drone, Invader Hovercraft, Invader Minelayer, Invader Mortar, Invader Factory (Plus attached Invader Guardians), Invader Shielder, and Invader Gunship, with an Invader Command Ship as the event boss.
Added 1 Boss: Ocean Crystal, summoned by using the Crystal Mirror at the ocean once the Moon Lord and Spirit of the Mirror have both been defeated.
0.5 changes
Added 9 items: the Sword of Ruin, Abyssal Dagger, Cursed Barrage Staff, Dark Energy Conduit, Spirit's Reaper, Blighted Crossbow, Dark Plasma Globe, Wisp Staff, and Death Emblem.
Added 1 Event: Death Invasion, containing Death Soldier, Death Archer, Death Knight, Death Mage, Death Mound, Fly, Wisp, Deathly Fossil, and Greater Wisp, with the Witch-General, Sword-General, and Deathly Spirit as event bosses.