The main problem with releasing new instalments year in, year out for long-running sports franchises is always the same: coming up with enough new ideas to make this year's game significantly different to last year's. But in this case, we can only assume that somebody at EA's development studio had been nudging the turps a bit too hard, because this year's big Tiger Woods innovation - and this is no word of a lie - is time travel.

Straight up. We're talking science fiction and professional golf combined in a non-stop explosion of time-bending, wedge-chipping action. Forget your woods and your irons - this is as much about Newtonian space-time physics and flux capacitors as it is about pars and bogies. It's not the hole you'll be shooting for on the green, it's the WORMhole! Okay, perhaps that's a slight exaggeration, but, amazingly, time travel forms the central premise behind Tiger Woods 06's new Career mode. Not content with the simplistic, slightly disjointed World and Legend Tour modes of previous games, Tiger Woods PGA Tour 06 now boasts a full era-skipping story. Called Rivals mode, it involves following Tiger Woods (resplendent in full period golfing costume) through history as he challenges the best golfers of yesteryear in an attempt to not just become the greatest golfer, but the greatest golfer of all time.

Which clearly sounds like a bit of a laugh - and it is, providing you realise that all it really comes down to is a slightly different front end for the same old par-three challenges and match-ups against fantasy and real-life golfers. There are no actual time-travelling pyrotechnics, just a few static clubhouse screens that change decor to suit your current time period, and the option to pick a match or challenge from the board behind the desk.

If anything, it's a step back from 04 and 05's Tour modes in terms of ease of menu navigation, but then when did those versions ever have Tiger in a flat cap and a pair of 1930s brogues?

However you end up feeling about Tiger's time-travelling adventure - and we get the feeling this one's going to split opinion - it's simply another example of the staggering amount of content that's been packed into this year's game. Apart from Rivals mode, there's still the PGA Tour mode (which can now run for a ludicrous 30 seasons), real-time events that unlock according to your Xbox's internal clock (with a different event for every day now no less), a new hoop-hitting 'Skills' game, plus all the usual matchplay, skins, Stableford and countless other golfing variations. In EA-speak, it's totally Tigerific!

But that's exactly what we expected. The Tiger Woods series has never lacked for content, after all. What's really at stake here are the changes to the actual golf itself, which leads us nicely to PGA Tour 06's biggest innovation - the Right analogue shot-shaping stick. In the same way you use the Left analogue stick to mimic the action of the club swing, you now use the Right stick to add spin, hook and draw to your shot.

While we like the idea in principle - the Left stick alone never felt suitable for subtle shot alterations - an immediate problem springs to mind for Tiger Woods veterans used to hitting the Black and White spin and power buttons: for humans with fewer than three hands, how is it possible to use both sticks and hammer the joypad at the same time? Answer: you can't, which initially makes the whole shot-shaping feature rather pointless. Why risk an awkward backspin shot on the analogue stick when you can just give the Black button a good bash instead?

But this is where Tiger 06 gets nasty, because once you switch things up to Tour difficulty - a virtual necessity if you want any challenge from the still routinely beatable computer - the button-mashing technique stops working, meaning you have to use the shot-shaping stick. It's not easy either. Wrenching just the right amount of spin out of it takes a fair amount of practice, but learn to use it properly and suddenly a whole new level of challenge awaits.

Likewise, Tiger Woods PGA Tour 06's new putting system makes for far more interesting play - rather than simply picking a target spot on the green, you now use the analogue sticks to hit the ball. It feels far more responsive and intuitive. Thankfully, the rubbish 'Tiger Vision' system from last year has also been ditched.

And the game gets harder still, with courses that change and adapt as you improve. Greens shrink, bunkers swell, grass lengthens and fairways narrow. Of course, you can still play the game the old-fashioned way, with all the caddy tips and swing-aids switched on, but given the lack of challenge was one of the biggest complaints about the series, we're all for it. Especially in multiplayer, which leads us nicely to our final point: the Live mode. As in, there actually is one!

Put simply, if you're a Live gamer you need Tiger Woods 06 in the same way you need Halo 2, Pro Evolution Soccer 4, Project Gotham Racing 2 and Dead or Alive Ultimate. It's taken its sweet time getting here, but as an online game this is perfect stuff: easy to pick up, difficult to master and immensely satisfying to beat your rivals at. You don't have to be a golf bore to enjoy it, just a fan of beating your friends, and for this reason alone we're giving Tiger the big thumbs-up. For another year running, Good for you, Mr Woods!

1. Even more content! More courses, more golfers, more challenges, more real-time events, more licensed stuff! More of everything!
2. Finally! A bit of challenge is added. Providing your stick to using the shot-shaping stick as opposed to the spin and power buttons, that is.
3. The new putting system is far more intuitive and rewarding than the old one. A very positive addition.
4. EA sees sense and adds Live play. Finally, one of our favouritest multiplayer games can be played online.

1. The single player is becoming something of a chore in places, with computer-controlled players who are still too easy to beat.

The control tweakings plus the addition of Live support makes this a solid update to an already excellent sports series.