Two games dominate Roblox’s collecting-simulator genre: Pet Simulator 99 and Fisch. One has you hatching millions of eggs for that 0.0001% Huge pet. The other has you casting lines into pixel-perfect waters, hunting for Mythic fish with the right bait at the right time.
They share the same core psychology — the dopamine of the rare drop — but execute it completely differently. Here’s which one belongs in your rotation.
At a Glance
| Pet Simulator 99 | Fisch | |
|---|---|---|
| Genre | Pet collecting / grinding | Fishing RPG |
| Players | Massive servers, trading hubs | Smaller servers, solo or co-op |
| Core Loop | Hatch eggs → collect pets → prestige → repeat | Cast line → catch fish → sell → upgrade rod |
| Pacing | Semi-AFK, background grinding | Active, attention-required |
| Economy | Player-driven trading (gems) | NPC merchant selling |
| Rarest Item | Titanic pets (0.00001% chance) | Mythic fish (bait + weather + location dependent) |
| Session Length | Hours (AFK-friendly) | 20-60 minutes per session |
| Update Frequency | Weekly events, constant content | Monthly updates, seasonal rotations |
| Free-to-Play | Viable but grindy | Very generous |
Round 1: The Core Loop
Pet Simulator 99 — “The Numbers Go Up”
You hatch eggs. You collect pets. Your damage number increases. You hatch better eggs. The cycle is endless, and it’s designed to be.
PS99’s genius is in the layers: you’re not just hatching eggs. You’re managing enchantments, min-maxing your team slots, timing rebirths, watching the trading economy, participating in clan battles, and grinding seasonal events. Each layer feeds back into the core loop.
Best for: Players who love optimization, spreadsheet-gaming, and watching numbers climb. The semi-AFK nature means you can “play” while doing other things.
Fisch — “The One That Got Away”
You cast a line. The bobber dips. You play the minigame. You catch a fish. You check its weight, mutation, and value. Then you cast again — because the next one might be rarer.
Fisch’s loop is simpler but more engaging. You’re always actively doing something. The weather changes, seasons rotate, and different fish spawn at different times in different locations. You plan fishing trips around optimal conditions, not just grinding hours.
Best for: Players who want immersion, atmosphere, and the satisfaction of earned skill. Catching a rare fish in Fisch feels more rewarding than hatching a Huge pet in PS99 — because you were there, actively, when it happened.
Winner: Fisch (engagement). PS99 (depth).
Round 2: The Economy
PS99 Trading Economy
PS99 has a real player-driven economy. Gems are the currency. Trading servers are Wall Street for 12-year-olds. Values fluctuate based on events, updates, and market manipulation. Learning to trade well is a skill separate from playing the game well.
The economy creates emergent gameplay: trade flipping, event speculation, clan resource pooling. It’s chaotic, exploitable, and genuinely interesting.
Fisch Merchant Economy
Fisch has a simple merchant economy. You sell fish to NPCs at fixed rates. No player trading. No market manipulation. The “economy” is just you versus the RNG — fish value is determined by species, weight, and mutation, not supply and demand.
This is simpler but more honest. You can’t get scammed in Fisch. You can’t lose a week’s progress to a bad trade. What you catch is what you get.
Winner: PS99 (complexity). Fisch (fairness).
Round 3: The Grind
PS99 Grind Philosophy
PS99 respects your time by not requiring it. AFK hatching means you progress while sleeping. The game is designed around the assumption that you’ll leave it running. Active play (events, trading, clan battles) happens on top of the passive grind.
The grind is long — Titanic pets can take months without Robux — but it’s low-friction. You don’t burn out because you’re not actively grinding most of the time.
Fisch Grind Philosophy
Fisch respects your time by making every minute count. There’s no AFK fishing (effectively). Every cast requires your attention. The grind is shorter — you can go from Flimsy Rod to endgame in a week of dedicated play — but it’s fully active.
You burn out on Fisch when you stop enjoying the fishing itself. You burn out on PS99 when you realize the numbers will never stop going up.
Winner: Tie. Different philosophies for different personalities.
Which Should You Play?
| You Should Play PS99 If… | You Should Play Fisch If… |
|---|---|
| You enjoy trading and market economies | You want pure, uncomplicated gameplay |
| You like background grinding while multitasking | You want to be actively engaged during play sessions |
| You love collecting thousands of things | You love the thrill of rare individual catches |
| You want constant events and updates | You prefer a calmer, more predictable content pace |
| You enjoy clan/group competitive play | You prefer solo progression at your own pace |
| The idea of a 0.00001% drop excites you | The idea of finding the perfect fishing spot excites you |
PS99 and Fisch are two sides of the same coin. Both scratch the collecting itch. Both have that moment — the hatch, the catch — where everything else fades away. The difference is in the texture of the journey.
Play Fisch to fall in love with a game. Play PS99 to fall in love with a spreadsheet. Both are valid. Both are Roblox at its best.