Simulators are the most-played genre on Roblox for a reason. The core idea is simple: you start small, earn a currency by doing one repeatable action, and spend it on upgrades that let you earn faster. Most layer pets or collectibles on top, and most add a "rebirth" that resets your progress in exchange for a permanent multiplier. The good ones make every step of that loop feel earned, and the best of them grow into full games with strategy, community, and a trading economy that gives your collection real meaning.
What follows are the standouts we would start with, sorted by the kind of player you are. These are the games we trust to introduce the genre well. You can browse the full list on the all simulator games page when you are ready to go wider.
Best simulator overall, and best for trading
Pet Simulator 99 is the current giant of the genre, and it earns the spot. The headline loop is pet collecting: you hatch pets from eggs, combine duplicates to level them up, and chase the rare Huge and Titanic pets that sit at the top of the ladder. Underneath that is one of the most active trading economies on the platform. Pets have community-understood values, and a good trade can move your account forward faster than hours of grinding.
That trading layer is what makes it more than a number-go-up game. Knowing what your pets are worth turns collecting into something closer to a market. If you want to check values before you commit to a trade, BloxTradeView tracks pet trade values; whatever you use, keep the trade itself inside the game's own trade window. Start here if you want the deepest, most-supported simulator with the most to do at the high end.
Best with real depth
Bee Swarm Simulator is the one longtime players point to when someone says simulators are shallow. You grow a hive of bees, send them out to collect pollen from fields, and convert that into honey to buy more bees and better gear. So far, standard. What sets it apart is the open world wrapped around the loop: quests from in-game characters, bosses to fight, tools and badges to earn, and a real sense of progression as you push into harder areas.
The strategy here is genuine. Different bees have different traits, and building a hive that works together rewards planning rather than just grinding. It asks more patience than most, and it gives more back. Pick this if you want a simulator that turns into an adventure.
Best for beginners
Bubble Gum Simulator is the friendliest door into the genre. The loop is gentle and clear: blow bubble gum to build up your blowing power, sell it for coins and gems, and spend those on hatching pets from eggs. Progress comes quickly at the start, so you learn how hatching, upgrading, and rebirthing fit together without feeling stuck.
It also has an active trading scene, which means the habits you build here carry straight over to bigger games like Pet Simulator 99. If you have never played a simulator and want to understand the genre in an afternoon, this is the easiest on-ramp. For a wider first-day list, the best games for beginners guide pairs well with it.
Best classic grind
Mining Simulator 2 is the genre stripped to its satisfying core. You swing a pickaxe, dig through blocks, sell what you collect, and use the money to upgrade your gear so you can dig faster and deeper. As you descend, the materials get more valuable and the upgrades get bigger, and that steady downward pull is the whole appeal.
There is something honest about it. The loop is the loop, and it stays satisfying because each new layer feels like a reward for the last batch of upgrades. Choose this when you want the pure mine-and-upgrade rhythm without a lot of extra systems competing for attention.
Best for collectors
Anime Fighters Simulator takes the loop and points it at combat. Instead of pets that boost your earnings, you collect anime-inspired fighters, power them up, and send them into battle against enemies and bosses. The draw is the roster: pulling a rare fighter and building a strong team scratches the same itch as a pet collection, with fights as the payoff.
If you came to the genre for the thrill of the next rare drop more than the idle grind, this is the one that leans hardest into collecting and combat together.
What makes a simulator good
A few things separate a simulator worth your time from one that wears out fast.
The loop has to stay satisfying. Earning, upgrading, and rebirthing should always leave the next goal within reach, never so far that the grind feels pointless.
Upgrades should change how you play, not just raise a number. The best games unlock new areas, tools, or strategies as you progress, so growing stronger also means doing something new.
Progression should be fair without Robux. Many simulators sell boosts, luck multipliers, or extra pet slots, and that is fine. The test is whether the game still respects your time if you never spend. A good one does not need your money to be fun.
An active trading community is a real plus. When your collection has value other players recognize, every rare find means more, and there is always another way to move forward.
No simulator needs a "free Robux" generator, and none exist. Those are scams that put your account at risk, full stop. The progress in these games is meant to be earned, and earning it is the point.
Start with one that matches your patience, and let the loop do its work. If none of these is what you are in the mood for today, what to play when bored has a few other directions to try.