Yes, but only if all you consider is interactive testing by actually playing the game.You would have to recruit around 500 000 people for testing every year just to match the testing power of 25 million gamers.
Developers are also able to write automated tests which can be run without needing human testers. Now I don't know to what degree the tooling exists for testing games. I write software for a living but web/business apps, I've never worked in the games industry.
For example, I can test web apps using a technology called "WebDriver". That literally drives a web browser around my app following a scripted set of commands, as if it were being used by a real person. It can then verify that after it's followed that script that it sees the expected result displayed on-screen.
Test automation for games would naturally be harder of course, because you're dealing with random events. You don't get exactly the same thing every time. You can set reasonable expectations though.
I could envisage a hypothetical game development testing framework that does something like: Place 6 AI game entities of opposing factions (2 of each from 3 factions) into a scene, in line of sight of one another. Run the game and wait for 2 minutes. After 2 minutes assert that no more than 2 of those entities are 'alive'. Another test could be run to verify that none of them have gone out of bounds, another to verify that none of their loot has gone out of bounds etc etc. These kinds of tests could be run automatically every night without taking up testers' time.
Of course I don't know if such tools actually exist, because it's a different industry to the one in which I work. I'd be very surprised if there's nothing like this though.