Ninja Kiwi has never released any financials, but the NZTE-backed Technology Investment Network estimated its 2020 revenue at just over $50m.
In a statement, MTG said Bloons would take it into a new gaming genre, tower defence strategy games, with a total of around 140 million downloads to date and 6.2 million monthly active users.
Ninja Kiwi released the first version of Bloons in 2007.
It was an international hit by the time of Bloons Tower Defence 5, which hit number two in the US App Store charts within 24 hours when it was released in 2012 - where it has been a fixture since.
The same year, Ninja Kiwi bought Scottish game developer Digital Goldfish for an undisclosed sum, doubling its staff to 35 in the process.
Ninja Kiwi has 70 employees today, split between its Auckland, New Zealand, headquarters and an office in Dundee, Scotland.
"We've spent 15 years building something really special here at Ninja Kiwi. From the early beginnings in Stephen's spare bedroom we've grown into a much more grown-up company and have the big boy pants to prove it," Stephen Harris said in a message to Ninja Kiwi players.
"But some things we're not so skilled at, and this is the opportunity that pairing with MTG offers. MTG and its group of gaming companies brings tremendous strength in several areas. Marketing is a good example of an area where our skill-set is pretty light. We don't have a single marketing person on staff after many years of doing this."
MTG is listed in Stockholm and has a market cap of SEK 11.2 billion ($1.75b).
Another one gone
With the deal, Ninja Kiwi becomes the third-big local tech company to fall into offshore control this month.
March 12 saw two big sale announcements, with Auckland-based retail software company Vend going to NYSE-listed Lightspeed for $455m, and Christchurch geologic software outfit Seequent going to Nasdaq-listed Bentley Systems for $1.4b.
And Ninja Kiwi's sale follows China's Tencent taking 90 per cent control of NZ's largest game developer, Grinding Gear Games, in a $100m-plus deal in 2018, as well as building a one-third stake in our second-largest game studio, Rocketwerkz.
The string of sales has reignited debate over the pros and cons of selling offshore, with lost intellectual property and profits, and a patchy record on keeping local jobs, balanced against money being recycled into the local startup ecosystem.
The action does go in both directions, too. Yesterday, Wellington-based, ASX-listed Xero said it was buying Swedish e-invoicing company Tickstar in a deal worth up to SEK 150 million ($23.4m).
NZGDA helps fill the gap
This morning NZ Game Developer Association director Stephen Knightly told the Herald that in terms of game studios, the sales "highlight the early-stage funding challenge New Zealand's game industry faces: clear potential to scale but no early-stage support to grow the next generation of creative tech businesses."
With "little Government funding" - a stark contrast to the film industry and other creative sectors - the NZGDA is seeking to address the funding gap, in part with its Kiwi Game Starter initiative, bankrolled largely by industry players, including Grinding Gear Games and PikPok.
Rose & Locket, a colourful New Zealand-made indie game by two-person team Whistling Wizard, has won this year's $25,000 Kiwi Game Starter, the NZGDA revealed this morning.
Battlecruisers by MechaWeka was the $10,000 runner-up.
The winner was chosen from 26 total entries, judged on their originality, aesthetics, production and commercial viability.
