If you’re looking for a management sim that’s a bit on the lighter side, you could certainly do worse than Megaquarium. Twice Circled’s aquarium construction sim is all about building oceanic attractions and filling them with weird and wonderful sea life.The base game released eight years ago, but Twice Circled has updated it consistently since then. Indeed, its next update is one of the biggest yet, built to splash down alongside a new expansion that’s all about underwater invertebrates.The free update is so substantial that Twice Circled detailed it in two separate blog posts. The first of these focussed on UI improvements, detailing adjustments like an improved search function and a tank capacity icon that helps players predict when a given fishtank will become full as the animals inside it grow.The second post delved deeper into changes to how Megaquarium plays. There are a bunch of more specific features that we’ll get into. But the most significant change for new or lapsed players is a revamp to the game’s campaign:”I’ve learned a lot over the years about what makes a good Megaquarium campaign,” writes Twice Circled’s director Tim Wicksteed. “With that in mind, I went back and polished up the original base game campaign to make everything run as smoothly as possible.”Improvements to the campaign include smoother progression that requires less repeated researching of animals and equipment, greater animal availability inside objectives, and tweaked research costs and prestige requirements for better pacing. “In summary: it’s the same campaign—only better!” Wicksteed…