Overview:
-Estimated achievement difficulty: 6/10
-Offline: 46 (1000)
-Online: 0
-Approximate amount of time to 1000: 120-150 Hours
-Minimum number of play throughs needed: 15 (5 for snooker seasons + 10 for pool championship)
-Number of missable achievements: None!
-Glitched achievements: None!
-Do cheat codes disable achievements? No Cheats
-Does difficulty affect achievements? No difficulty option

It is possible for anyone to get 1000 on this game but it will take you a while and the A.I has the ability to win any frame of snooker or pool in one visit. I suggest you go the route of saving and reloading of matches that you look like you might lose. Slightly less time consuming than WSC 2007 though.

Introduction:
World championship snooker 2009 is a long and very repetitive 1000. My main tip for the game is when you are in either championship mode, ensure that if you are losing or looking like you will lose then quit out of the match either by pausing and quitting (make sure the A.I. has not potted the winning ball) and this will take you to start of the match with the scores at 0-0, or exit to dashboard and reload this will take you to the last save point which will be the frame before you quit out. There is a rumored cheat for unlocking everything but does not unlock the ability to max your stats and gives no real advantage to get the 1000. There is also a massive glitch where some people report being able to simulate every game and win without even playing but this seems very random and did not happen to me.

Step 1: Tutorials, etc.
I would suggest that the first thing you do is complete the tutorials, then trick shots and then challenges. These will give you one skill point for each completed shot to improve your player's stats. Doing the above 3 things will get you 115 skill points, I would concentrate on adding skill points to potting and positioning to get these as high as possible.
Completed Tutorials, Trick shot Champion, Completed Challenges - 80

Step 2: 8 Ball
Start an 8 ball season next. It will take a bit of getting used to the difference between the spot ball and stripes ball as it is not too easy to see sometimes. In WSC 2009 there is only one tournament in the pool season and once you win the tournament or get knocked out you need to start a new season. There are 4 matches to win in order to win the tournament. If you are going for the whole 1000 you will need to win this tournament 10 times. After winning it 10 times you should have added at least another 40 skill points.
Pool: Pot 2 balls in a row, Pool: Pot 4 balls in a row, Pool: Pot 6 balls in a row, Pool: Match Winner, Pool Championship Semis, Pool Champion, Pool: Longevity, Pool: 2 for 1, Pool: Jump Shot - 150

Step 3: Golden Cue
After you've won the 8 ball championship in step 2, you should have unlocked the golden cue tournament. I would advise doing this now as you have to play snooker, 8 ball and 9 ball and you can get by without winning all the snooker frames. You will also gain point towards your stats for winning these games. I suggest you go the route of saving and reloading matches that you look like you might lose or you will have to start the tournament all over again if you lose in the final. It is likely that you will unlock some of the snooker break achievements while on you snooker frames and maybe some of the 9 ball achievements. If you don’t, do not worry as you will have the chance many more times later on.
Golden Cue Champion - 20

Step 4 – Mini Mop Up
Having completed the 8 ball achievements you can now mop up the last of the pool achievements by going into versus mode, 9 ball match and set the frame length to 25 frames. I would go for the Pool: Break Ace every time it’s your turn to break and Pool: Jammy every time the A.I. breaks. This way if you do not sink the 9 ball from the break you can then go for Pool: Entire rack from the break. Also you will be able to get Pool: Jump shot and Pool: 2 for 1 in 9 ball mode if you did not get these in 8 ball mode.
Pool: Entire rack from the break, Pool: Jammy, Pool: Break Ace – 45

Step 5: Snooker
There is no quick way of doing this, you will need to win nearly every tournament for at least 2 seasons to unlock all the snooker achievements. The first tournament you start you will have to play 5 qualifying games and once you get used to the game you should find it not too hard. You need to be ranked 15th in the world (you can check this every time you start a new match) by the time the 3rd tournament (pot black) comes around in the second season. The easiest way to get all the achievements is to complete two whole seasons and win every single tournament this way the only achievements you will not automatically get is Snooker: Break 147 and Snooker: Complete clearance. Most Snooker achievements – 655

Step 6: Mop up and Finish
If you have not get the 147 break by now you should start your third season and concentrate just on this, if you are playing someone low in the ranking then I suggest hitting and splitting the reds quite wide open and hope the A.I. will miss, if he does you will have a nice open bunch of red for your break if he pots and clears up do not worry and do not quit. Once you have your 147 break you can now lose every match you play. The quickest way to do this is start the match and as soon as it is your shot pause and concede frame. Do this for the last 3 seasons and when you finish season 5, the Snooker: Longevity will unlock.
Snooker: Longevity – 50

Conclusion:
In conclusion a very long, but not too hard 1000. Because you can play the snooker and pool seasons for an infinite number of seasons, any achievements that are not unlocked in either snooker, 8 ball or 9 ball can be played for as many times as you want. The hardest achievement on the game is the 147 break, but if you take your time it should come. My only advice would be make sure you add points to potting and positioning before adding to any other skills. If you are really struggling you can use a piece of A4 paper to line from the middle of the cue ball to the middle of the pocket and then move the ball marker to the edge of the paper. Good luck...