If you’ve been on Roblox for more than five minutes in the past couple of years, you’ve probably heard of Pet Simulator 99. It’s sitting at around 76K concurrent players right now, 2.4 billion total visits, and it just dropped Update 77 earlier this month. This game is not slowing down. And honestly? After spending a solid chunk of time with it, I get why.
Let me break it all down for you — what it is, how it actually works, and whether it’s worth jumping into right now.
What Even Is Pet Simulator 99?
The core idea is simple: collect pets, break stuff, get richer, repeat.
PS99 is made by BIG Games — the same studio behind the earlier Pet Simulator titles — and it launched in December 2023 as the fourth game in the series. The “99” in the name isn’t really about a number; it’s more of a vibe, like this is the definitive version of the formula they’ve been building toward. And in a lot of ways, it delivers.
You start with a basic pet and use it to smash breakables scattered around the map — coins, chests, gifts, that kind of thing. Your pets do most of the actual work automatically, breaking things nearby while you run around and tap stuff yourself to speed things up. The resources you collect unlock new areas on the map, which in turn have better breakables worth more coins and diamonds. Then you spend those to hatch eggs. Eggs give you new pets. Better pets break things faster. You unlock more areas. The loop continues.
It sounds simple on paper, and the early game genuinely is simple. But there’s a surprising amount of depth underneath.
How the Progression Actually Works
Getting started is easy. Getting good takes a real investment.
When you first drop in, you’re hatching Basic-tier pets from cheap eggs and slowly making your way through the opening worlds. The rarity ladder goes Basic → Common → Rare → Epic → Legendary → Huge → Titanic → Gargantuan, and the jump between Legendary and Huge is enormous. We’re talking about a single Huge pet outperforming your entire stack of Legendaries combined. So your early-game goal is basically: survive, accumulate, and get your first Huge as fast as possible.
To get a Huge, you need to do two Rebirths first — the game literally locks Huge pets from hatching until you’ve gone through that milestone twice. Rebirths are essentially a prestige mechanic where you reset some progress in exchange for permanent bonuses. They’re unlocked as you advance through the map, and they’re a huge part of what makes longer sessions feel meaningful.
There’s also a Masteries system that adds passive upgrades across five categories: Breakables, Economy, Egg, Fishing, and Keys. Each one improves a specific part of the loop — like faster hatch speeds or better loot from chests — and they give you something to work toward even when you’re not actively grinding for pets.
The Trading Scene
Half of this game happens in the trade chat, honestly.
Every pet has a value determined by rarity and demand, and there’s an active economy built around trading. You can swap pets with other players, and there are even dedicated tools like Cosmic Values that track Recent Average Prices for pets so you can trade without getting completely lowballed. Update 77 actually added a toggle to show Cosmic Values RAP directly in your inventory — so you don’t have to tab out mid-trade to check if someone’s offering you something fair.
Fair warning though: the trading scene can be a lot to learn. Event pets especially go through wild price swings, so if you’re new, I’d recommend watching the market for a week before making any big trades on limited stuff.
What’s New in Update 77 (May 2026)
This update dropped May 2nd and it’s one of the bigger content drops in recent memory.
The main attraction is the Fantasy World / Veilwood Hollow — a new event zone with misty grove aesthetics and castle ruins. There are nine new mystical pets tied to the event, and the flagship one is the Wicked Kirin, which BIG Games themselves are calling the strongest pet in the game right now. It’s event-limited, which means once the Fantasy World event ends, you won’t be able to get it from normal play. Supply freezes. Trading value tends to spike post-event. If you’ve got the grind in you, this is worth chasing now rather than later.
The update also added Time Trials — a permanent competitive mode where you race through waves of breakables and boss chests. It runs on 48-hour league resets with daily solo leaderboards. This is the first real competitive mode PS99 has had, and for end-game players who’ve been grinding the same loop for a while, it genuinely shakes things up and gives your pet loadout something to actually prove.
There’s also the Fantasy Combine-o-Matic, a five-tier present crafting mechanic. You stack Small Presents all the way up to a Titanic Present, and the top reward is a Titanic Ruinous Angelus. The tip here: don’t sell your small presents. The combine chain is worth considerably more than selling each tier individually, and a Titanic-tier pet at the end commands a serious premium while event supply is limited.
Rounding out the update: the Infinity Egg (hatch any previously-unlocked World 1–4 egg from the Fantasy spawn), Rank 40 expansion with new rewards including a T11 Damage Potion and Golden Prison Key, and a Trading Terminal move to the Super Computer with drag-delete for faster trade setups.
What I Actually Think About It
It’s genuinely one of the more addictive games on the platform right now, but it’s not for everyone.
If you like progression systems with a lot of layers, there’s a ton here. The early game is smooth and accessible, and the curve toward Huge pets gives you a real target to work toward. The trading economy is legitimately engaging once you understand it, and Update 77’s addition of Time Trials finally gives top-tier players something competitive to grind toward.
That said — it is a grinder. If you don’t enjoy the loop of breaking things, hatching eggs, and slowly optimizing your loadout, this isn’t going to click for you. And the trading scene has a learning curve that can feel overwhelming at first. The Wicked Kirin is behind event-exclusive grinding that takes real time investment.
But for the right kind of player? This game is incredibly satisfying. There’s always something to work toward, the update cadence is consistent, and 2.4 billion visits doesn’t lie — this community is massive and active.
Should You Play Pet Simulator 99 Right Now?
Yes — and specifically right now while the Fantasy World event is live.
If you’ve never tried PS99, this is actually a great moment to start. The Fantasy World gives you a concrete event goal to push toward, Time Trials gives you something to test yourself against once you’ve got a decent loadout, and the Infinity Egg is a genuinely helpful feature for new accounts working through the worlds.
If you’re a returning player who stepped away a while back, Update 77 is exactly the kind of content drop that makes it worth booting back up. The Time Trials mode especially — it’s the freshest thing PS99 has added in a while and it changes how the end-game feels in a meaningful way.
Jump in, break some stuff, get your first Huge, and try not to get too deep into trade chat on your first day. Trust me on that last one.