Consumers signing up for home broadband with O2 are being given the chance to receive the new Halo 4 game for free.
Gamers can also get their hands on 2,100 Xbox LIVE points when they sign up to the firm's The All Rounder or The Works broadband deals.
This will allow them to download more games, films or music over the internet.
Alternatively - for non-gamers - the points can be used to stream HD movies and watch live sports and TV on Sky Player.
O2's The All Rounder broadband deal offers up to 16Mb broadband, unlimited downloads, a free wireless router and evening and weekend home phone calls.
The broadband package is priced at £25.50 for O2 mobile customers, who are also entitled to receive a 50 per cent internet discount for 12 months.
As such, they are required to pay just £19.25 per month over the first year of their contract.
Non O2-mobile customers pay £30.50 per month for the broadband package, with six months' half-price broadband reducing this fee to an initial £21.75 per month.
O2's The Works broadband deal also offers up to 16Mb broadband, unlimited downloads, a free wireless router and evening and weekend home phone calls.
Subscribers also receive the fastest upload speeds available - ideal for Xbox LIVE users - an 'N' class Wi-Fi router, a static IP address and five free McAfee licences for online security.
Again, O2 mobile customers can take advantage of 12 months' half-price broadband - reducing the cost of this deal from £34 to £24.50 per month.
Non-O2 mobile customers receive a six-month discount, meaning they pay an initial £26 per month and then £39 per month after the introductory period.
All new customers can enjoy playing Halo 4 - a first-person shooter game which sees the series' protagonist Master Chief return to battle against ancient evil.
"Shipwrecked on a mysterious world, faced with new enemies and deadly technology, the universe will never be the same," O2 noted.
The firm urged subscribers to redeem points through the Xbox LIVE Marketplace in order to heighten their gaming experience.
"You also can download HD movies or TV shows for an instant movie night or pick up and play arcade games the whole family will love," the firm explained.