"It gave us all goosebumps" says Sebastian Zwiebel, as he recalls the moment his team shut down Hydra, the world's largest darknet marketplace.
The slower slotxo wallet the gameplay, the better. The lower the payout, the 3-reel slot game. Simple, old-fashioned, fast play several times an hour.
The website was a bastion of cyber-crime, surviving for more than six years selling drugs and illegal goods.
But, after a tip-off, German police seized the site's servers and confiscated €23m (£16.7m) in Bitcoin.
"We've been working on this for months and when it finally happened it felt big - really big," adds Mr Zwiebel.
Police say 17 million customers and more than 19,000 seller accounts were registered on the marketplace, which now carries a police seizure notice.
Hydra specialised in same-day 'dead drop' services, where drug dealers (vendors) hide packages in public places before informing customers of the pick-up location.
Shortly after the German action was announced, the US Treasury issued sanctions against Hydra "in a coordinated international effort to disrupt proliferation of malicious cybercrime services, dangerous drugs, and other illegal offerings available through the Russia-based site."
In the past six months, many high-profile darknet markets have shut down but Hydra was seemingly impervious to police attempts to stop it.
The website launched in 2015 selling drugs, hacked materials, forged documents and illegal digital services such as Bitcoin-mixing - which cyber-criminals use to launder stolen or extorted digital coins.
