Sonic Adventure 2

This achievement is fairly easy really, if you're a veteran of SA2 or not. On the menu, choose to play 1P and story, then choose the dark story.

There's fourteen levels to complete in the hero side of the story, split between Shadow, Rouge and Eggman. Unlike the Hero story, there are more levels for Eggman this time.

Tips:

Shadow levels are the fastest levels of the three, representing Sonic on the dark side. However, be aware at all times that there can be sections where you have to do technical aspects. During these sections, take your time if you want to be sure of the completion. In particular, the later levels (Final Chase being the main one) has quite long sections where you aren't really racing through like you'd expect. Time, Rank, Score, or anything like that don't matter, so don't worry about going too slow. in Final Chase, really try to make sure of the jumps onto the gravity cylinders, as sometimes they can be quite glitchy and when you think you've got it, you can miss and fall. also, beat enemies to avoid them shooting you in midjump and causing you to completely miss everything, some of the blue 'chaos' style enemies have quite a range

Eggman levels are run and gun, or rather walk and gun. The best tip for Eggman is to hold the shoot botton (X is easiest) for the good majority of the time, and you'll automatically target anything that flies towards you. These enemies are the biggest pain, not really doing much to damage you greatly, but it can knock you off the level to a certain life loss. These levels are harder than the Tails levels on the hero side, but still not too tricky. In Cosmic Wall, there is less gravity than normal. Rather than this being a hinderance, it can aid you better because you don't have to deal with the rubbish jumping ability of Eggman's robot.

Rouge levels are mainly just irritating, while not being much of a problem to losing lives or not being able to complete. They're more time consuming though. You have to find 3 shards of the master emerald within the level, which can be hidden in various boxes, enemies and underground or within walls. Either that or they can be simply floating around, on a certain path or stationary. They do however, have certain places which they can be, so you can memorise some locations if you die. Get clues by reading the monitor screens, which then all the clues you gather after the first will relate to the same emerald shard. after you gather that, the next clue will relate to another and all following relate to that and so on. This doesn't mean you can't collect the other gems that you don't have the clues to, but they will be either by accident or fantastic eyesight. As you near the emerald, the radar at the bottom of the screen will light up, first green, then yellow, then red, and a chiming sound cn be heard. When you are really close to the emerald, a red bubble with an exclamation mark above Rouge's head to let you know you are very close. use these to close into the emerald. Often, the Rouge levels have extra things to deal with, which makes them a little trickier than Knuckles' levels. Security Hall has a five minute time limit, but the level itself is fairly small, and you should be able to do it. Some of the emeralds in this level can be behind security doors, drill into the middle of the over that center screen to open them. Egg Quarters has a beetle robot that roams the level and can shoot you with lasers. hide in the shadows whenever the screen beings to flash. Mad Space is very tricky. The clues and monitor readings are reversed. Some are literally written backwards, others give false information which can be annoying. The level itself is massive though, which can mean huge amounts of time spent searching this level for them.

as for the bosses, mostly they are repetitive, with the only real tough fights being the ones between the hero characters once you get closer to the end of the game. In the fight against Knuckles, keep hold of a couple of rings and go on the offensive, he can be damaged by punches, or by using drill claw on top of him. For Tails, keep on the move and try to stay away from the centre as you dont want to be caught in an explosion. If Tails goes near the middle, target the green floating container and shoot it to make it explode, hopefully catching him. When he shoots missiles, move quickly to avoid, but the laser needs to you move behind him for a nice cheap shot. Be warned that the laser can damage heavily, and hit you twice if you get caught badly by it. Avoid at all costs. For the final Sonic fight, when you're on the move, use the rings to your advantage. Wait for him to appear in the middle of a line of rings in the middle, and then use your light dash to damage him. Sometimes it doesn't work, but its the best method that hits more sucessfully than homing attacks.

Good Luck

EDIT: can any negative voters add a comment when you vote and let me know why you voted that way so I can improve it please?

DARK! - 20G (Original Achievement)

Difficulty: 4/10

This is literally a Story Based Achievement and cannot be missed as long as you complete every level along the way.

To get this, pick the "Story" option from the main menu and select the "Dark Story" You will play every level and fight all the bosses as Shadow, Dr. Eggman, and Rouge.

Shadow: Shadow's levels are fast paced, run to the Goal Ring missions. You can be as slow as you want and get an E rank in every level and still get this Achievement in the end. So take your time or rush, its your call.

Dr. Eggman: Dr. Eggman's levels are Target Shooting, while moving to the Goal Ring, missions. Once again you can get a pathetic score and get an E Rank and still get this achievement in the end.

Rouge: Rouge's levels are hunting 3 Emerald Shards (or Keys) missions. Again you can take forever and get an E Rank, and still get this Achievement in the end.

The Story plays out in order as follows:

1. Iron Gate: (Dr. Eggman)
2. Boss: Hot Shot (Shadow)
3. Dry Lagoon (Rouge)
4. Sand Ocean (Dr. Eggman)
5. Radical Highway (Shadow)
6. Egg Quarters (Rouge)
7. Lost Colony (Dr. Eggman)
8. Weapon's Bed (Dr. Eggman)
9. Boss: Tails (Dr. Eggman)
10. Security Hall (Rouge)
11. Boss: Flying Dog (Rouge)
12. White Jungle (Shadow)(You must clear this stage in 10 minutes!)
13. Boss: Sonic (Shadow)
14. Route 280 (Rouge) (This is a driving mission, so simply drive to the end to clear it.)
15. Sky Rail (Shadow)
16. Boss: Egg Golem (Dr. Eggman)
17. Mad Space (Rouge)
18. Boss: Knuckles (Rouge)
19. Cosmic Wall (Dr. Eggman)
20. Boss: Tails (Dr. Eggman)
21. Final Chase (Shadow)
22. Boss: Sonic (Shadow)


Once you clear these levels with any Rank you will get your Achievement either before or after the Credits play.