With its widespread mobile network coverage and relative security, the sprawling University of Lagos campus is quickly becoming a breeding ground for aspiring Pokémon Go “trainers,” AFP reports in Business Day Live.

Nintendo’s hit mobile game is not officially available everywhere. Its roll out changes by the hour. It’s available in the U.S., Australia, New Zealand, Germany, U.K., Italy, Spain and Portugal, according to Polygon.com and other sources.

In Nigeria, the Ajiboye brothers found a way to download the game when it was released early this month.

People are going crazy over Pokémon Go, which allows players to join one of three global teams, search for Pokémon monsters and battle for territory using GPS. But the game almost immediately became associated with risky behavior.

Users say they enjoy how the app encourages them to explore their towns and cities and interact with others, Bloomberg reported in Mail & Guardian.

But wandering through public places glued to your smartphone is an invitation for trouble. A late-night hunt for Pokémons in Missouri, U.S., led some players into a trap set up by armed robbers, local media reported. U.S. highway authorities have told gamers on their official Twitter feed not to drive while playing. They use the warning “Eyes up, Poké Balls down, people.”

Pokémon GO follows the basic premise of Pokémon, a Japanese video game and anime series where adventurers travel the world seeking Pokémon (“pocket monsters” in Japanese) to train and battle with each other. The app allows users to wander their neighborhood in search of Pokémon beasts who pop-up on their phone, Bloomberg reported.

A software developer and electrical engineering student at the University of Lagos, Timi Ajiboye said sometimes it’s not safe to bring out your phone in Nigeria.

“Here it’s like Mad Max, you’ve gotta be sharp or else there will be some injuries,” Timi told AFP. “Thieves will come at you like flies,” said Ajiboye’s younger brother Tade.

Like other players around the world, the Ajiboye brothers found a way to download the app.

Nigeria is Africa’s largest mobile market. Companies have committed to 3G coverage in 90 percent of the country and are starting a fiber network roll out in six cities, according to Bloomberg.

In the U.S. you can hire a Pokémon Go trainer, according to Huffington Post. A 24-year-old freelance journalist and New York University graduate who goes by the name Ivy St. Ive placed an ad on Craigslist advertising her services as a Pokémon Go trainer for $20 an hour.

The game has made Nintendo worth $7-billion more than last week.

Nintendo owns a part of Niantic Inc, the San Francisco-based developer of the game. Pokémon Co., a separate company from Nintendo, also owns a stake in Niantic, as does Google Inc. Investors are betting that the game’s smashing debut will mean millions of users will buy virtual items and businesses will advertise in the game, Bloomberg reported.

St. Ive said she took down her ad as a Pokémon Go trainer for fear of being banned by Niantic, which is notorious for banning people, Huffington Post reported.

Not long ago, playing Pokémon Go would have been unthinkable in Lagos, which is known for patchy mobile coverage, according to AFP. Coverage has improved, but most Nigerians still carry two or three mobile phones subscribed to different networks so they can switch during service lag times:

In a perfect world, Tade says he would have the game installed on both his Android and Apple phones, carry an Internet dongle and power bank to charge flat batteries. He would also wear holographic glasses so he could experience three-dimensional Pokémon similar to when Princess Leia appeared as a blue apparition in the film Star Wars.

Pokémon Go hasn’t been released worldwide yet but someone in South Africa figured out a hack enabling you to get around geographic restrictions, Okay Africa reported.

Telkom Gaming gives instructions on how to play In South Africa if you have an Android device.

The popularity of Pokémon Go put severe strain on Niantic’s servers. The company paused its international roll-out to upgrade its server capacity, Niantic CEO John Hanke told Business Insider.

Once they were comfortable, Niantic resumed launching in new countries, My Broadband reported.

Pokémon Go is now the biggest mobile game in U.S. history, according to SurveyMonkey.

Other mobile games that experienced initial hype saw their user numbers plummet after a few weeks. Newly-launched online games rarely sustain their initial user numbers after the novelty wears off.

Niantic may not want to invest in server capacity that may become redundant soon, according to My Broadband. To ensure the game remains sustainable, it may be better to gauge uptake and player retention, give subscriber numbers a chance to stabilize, and then roll out further.

Pokémon Go’s growth shows no signs of slowing down, though. SurveyMonkey suggested it may soon beat SnapChat and Google Maps for daily active users.