A report by UK games industry trade organisation ELSPA, and the Interactive Software Federation of Europe, says that 32 per cent of UK adults - nearly one in three - have played a computer game in the last six months.
According to the report, the majority of active gamers play for around an hour a day.
The report also reveals that eight per cent of gamers play for more than 16 hours per week, and that 74 per cent of UK teenagers consider themselves to be 'hardcore' gamers.
According to the figures, the most popular gaming platform is the PC, with 33 per cent of all UK gamers using it. The Wii was the second most popular, attracting 27 per cent of users. Microsoft's Xbox 360 came third with 9 per cent.
Discussing the survey's findings, ELSPA Boss Michael Rawlinson said: "In the last few years, the development of motion sensor technology saw gaming become more accessible to new audiences who didn't previously connect with the industry."
"With the growth of gaming platforms such as social networking sites and the iPhone," added Rawlinson, "we are witnessing once again the growth of gaming into new areas of society, truly showing that the UK is a nation of gamers."