Insaniquarium Deluxe

Seventeen of Insaniquarium's hundred most-helpful negative reviews describe it as a clicker. That word didn't mean anything in 2006.

The loop is unmistakable in hindsight: you click a screen to harvest currency, spend the currency on things that harvest currency faster, and try to keep the whole accelerating machine alive. Two years before the browser incrementals and six before Cookie Clicker, PopCap shipped it with fish.

That's the reason to write about a twenty-year-old casual game in a library like this one. It's also still 97.4% positive across 5,208 English reviews, with 97 of the last 100 positive, which is a remarkable thing for software old enough to vote.

What it is

Each tank starts with a fish, a food button and a coin trickle. You feed, you collect, you buy better fish and upgrades, and periodically an alien arrives and you click it to death. Pets hatched from eggs automate parts of the job — collecting coins, feeding, fighting — which is recognisably the same idea every idle game since has built on.

It works because the pressure is real. Fish starve if you're slow, aliens punish inattention, and each tank ratchets up until you're managing three problems at once with one cursor. A run is short, the escalation is clean, and the sound design is the specific kind of chirpy that lodges in your memory for two decades.

The nostalgia in the reviews is genuinely striking. A 210-vote positive: "when i was in kindergarten and 1st grade and stuff i always wanted this game… it is now 2015 and i finally have the game after all these years."

The problem is that it often doesn't run

Here's the finding, and it's the reason the score isn't higher.

Thirty-seven of the hundred most-helpful English negatives are technical failures — fatal errors, crashes, fullscreen and resolution problems, or the game simply not opening. That's not criticism of the design; it's people who bought it and couldn't play it.

Specifics, quoted as written: "FATAL ERROR Invalid partner properties signature." "When started, 29 'Fatal error' are displayed." "Every time I try to open the game now, my screen goes off and gives the 'Monitor going to sleep message'."

I dated every one of them, because a twenty-year-old game's complaint history is mostly archaeology. The distribution doesn't decay the way an old game's usually does — 2 in 2014, 5 in 2020, 6 in 2023, 7 in 2025 and 2 already in 2026. A 30 December 2025 review: "The game needs significant improvements for modern operating systems. I am using Windows 11, and I'm facing a fatal error." A 2 January 2026 review reports a glitched in-game cursor even in Windows XP and 7 compatibility modes.

These are not historic reports. They're current, and there's a clear reason: the game has never been patched on Steam. Its entire announcement history is a single 2017 post, which is a promotional list rather than an update. This is a 2006 executable being sold, unchanged, in 2026.

I'd note in fairness that nobody promised otherwise, and NZ$5.99 for a two-decade-old casual game is not a grand bargain being broken. But it's a different situation from The Ascent, where a modern game's save-destroying bug went unpatched — here the issue is simply age, and the honest advice is to look at the community discussions for compatibility workarounds before buying rather than after.

Why 97% anyway

Because most people who buy it get it working, and the ones who do are delighted. The recent window holds at 97 of 100 positive with a 5.2-hour median, which is about the length of a satisfying revisit. The negatives that aren't technical are the predictable ones: repetitive in 7, boring in 4, short in 4, and a fair number of reviewers noting that without childhood attachment there isn't much here for a modern player.

A 10-vote reviewer puts that honestly while marking it down: "I do recommend this game if you have also experienced this game in your early days, and want to re-experience that. As for newcomers… I don't recommend this game at all."

The verdict

Insaniquarium Deluxe earns a 7. The design deserves better than that — originality scores an 8.5 because this is a genuine ancestor of an entire genre, and the moment-to-moment play still holds up twenty years on for six dollars.

Performance scores a 4.5, and that's what pulls it down. When more than a third of a game's critics are reporting that it won't start, crashes, or won't fill a screen — with fresh cases this year and no patch in the game's entire Steam history — that has to count against a purchase recommendation even when the game itself is good.

Buy it for the memory, or to see where the clicker came from. Just budget ten minutes reading the compatibility threads first.