3DS generated more than £22 million in UK software sales during the first half of 2013, according to new estimated data.
Sales figures show that some 800,000 3DS games were sold across retail during the initial six months of 2013 - with nearly half the total coming through May and June.
The data, published on Gamasutra, does not include digital purchases made over Nintendo's eShop digital store, meaning that the final figure could be considerably higher.
Nintendo had to persevere through a challenging initial launch for 3DS, though a prolific software release period has helped drive the system past the 30 million global sales mark. Nevertheless, the handheld is now tracking behind the original Nintendo DS in terms of life-to-date sales.
The outlook for Nintendo's home system, the Wii U, remains uncertain.
The console only managed to shift 179,000 games in the first half of 2013 - that's roughly five per cent of the PS3 game unit sales (3.2m) and even less when compared to Xbox 360 (4.3m). It is also less than a third of the games sold on Wii (650,000) and trails Vita software sales (198,000).
Nintendo hopes it can revitalise sales with a holiday games line-up headlined by Super Mario 3D World.
Meanwhile, the figures also suggest that the Xbox 360 took a 38 per cent share of all software sales at retail during the first six months of the year.