If Halo 2 wasn't enough incentive for Xbox owners to sign up to the Xbox Live service, Microsoft has introduced an “invite a friend” deal between now and the end of January.

Basically if you sign up a friend to the service, you are entitled to a free game from the following list:

- Midtown Madness 3
- Crimson Skies: High Road to Revenge
- CounterstrikeTM
- Links® 2004
- Sudeki
- Ninja Gaiden
- Fable
- RalliSport Challenge 2
- Project Gothem Racing®2
- Top Spin

Microsoft suggests there isn't a limit to the number of friends you refer so grab the ten other mates and all the titles can be yours.

You can find out more information at http://www.friendsforlive.com

>> Microsoft - Official website of Microsoft