In 2021 PCG reported on a singular scientific experiment: rats named Carmack and Romero had been taught how to 'play' Doom. I use the inverted commas because, cute and cool as it was, the question of whether the rats were really playing Doom in any meaningful way, or just running on a ball for some delicious sugar water, was not conclusively answered.
The project leader Viktor Tóth said at the time he wasn't happy with how they'd implemented the shooting response, and four years later the team is back with a new setup that significantly expands what the rats can do (first spotted by Tom's Hardware). And this time, the rodents are rocking a trigger mechanism.
