- Estimated achievement difficulty: 7/10
- Offline: 47 
- Online: 3 
- Approximate amount of time to 1000: 25-40 Hours
- Minimum number of playthroughs needed: 2 on World tour, 1 on Grand Prix and time trial.
- Missable achievements: None
- Do cheats disable achievements: No Cheats
- Unobtainable/glitched achievements: None
Welcome to the Sonic All-Stars road map! Be sure to play World Tour mode first, this will save you time in the long run. This will be a smooth ride for the most part until you have to take on the traffic challenges on expert which are merciless, and the time trials are pretty difficult too.
However with enough practice and determination everyone should be able to overcome this fun little gem.
Step 1: Complete world tour on normal/Hard
Be warned now, at the end of the tour expert mode will be unlocked. Playing on hard only to find out there is an even more difficult mode awaiting you is not the most fun experience. However chances are you'll get better at the game than you would normally. So it's up to you. Either way will be fine however I will advise normal. (Easy mode isn't an option as you won't have enough stars to unlock expert mode by the end of the tour).
Step 2: Complete world tour/Grand Prix/Time trial on expert
After having fun with the world tour mode you will have unlocked expert mode for every game mode. This is where it gets fun. Grand Prix mode will be the easiest of the 3 requiring you to simply be good at the game. World Tour mode will be a bit more difficult with certain challenges giving you trouble but apart from traffic and the odd difficult boost challenge it shouldn't be too bad. Finally Time Trial: Now the easy, normal and hard ghosts you can usually beat in one try, however for the expert ghosts it will take considerable skill and many trial and error lap runs.
Step 3: Obtain online achievements
After all that time on expert winning one race in matchmaking should seem an absolute breeze. "Newtron" requires zero skill will also be easy. "Team Sonic" however will require a little boosting for most of you. Refer to the thread https://www.xboxachievements.com/f...d.php?t=400610 for partners.
Step 4: Mop up missed achievements
You should now have most if not all achievements. More than likely you will be missing "Shadow Step" and possibly a few others. Refer to the achievements to see how you can acquire them.
Sega has stepped up the difficulty considerably for this one and you won't be beating it overnight. You'll find traffic challenges and time trials to be an experience you'll soon want to forget.
However, once you get used to the game you should find it a fun and rewarding 1000.
[XBA would like to thank mr wong tong for this roadmap]