The developers of the FIFA series made a complete overhaul of the game's engine for the 2006 installment of the title, asserting it had dramatically increased the control of play, having rewritten more than half the programming code. In addition to a renovation of the game play engine which discards the "Off the ball" system, developers boast a significantly more involved career mode and the introduction of "team chemistry" which will determine how well teams play together. This installment will break with a long tradition of commenting from John Motson and (more recently) Ally McCoist, replaced by ITV's Clive Tyldesley and Sky pundit Andy Gray (who has already worked on the series as guest commentator in FIFA 98).

Career mode in FIFA 06 is now a 15-year journey as the manager of a club of the player's choice. The player starts by filling in basic details such as their name, date of birth and country. From here, the player gets to choose which team he would like to manage. However, only clubs with a four-star rating or below are selectable. In a new addition to the game, players now must manage a budget to build the club on. The budget can be spent on player contracts, upgrading staff and coaches at the club and transfer budgets. To increase the budget, players receive money through gate ticket sales (from playing games) and through sponsorship.

UNLOCKABLES

My FIFA store points

Complete the following tasks to earn the corresponding number of points at the My FIFA store.
Complete the Underdog challenge: 500 points 
Complete the Hat Trick challenge: 500 points 
Win the LDV Vans Trophy: 500 points 
Win the Football League 1: 500 points 
Win the Football League 2: 500 points 
Win the Scottish Cup: 500 points 
Complete the 5 Minute challenge: 750 points 
Win the League Cup: 750 points 
Win the Football League Championship: 750 points 
Win the Scottish Premier League: 750 points 
Win the English Cup: 1,000 points 
Win the F.A. Premier League: 1,500 points.

Here's a video of the game: