So I finally got around to finishing Hydrophobia and have realised that no one has even made a guide yet and this game has been out for quite a while now. I thought I'd write a quick guide to help people out getting started as I know that it would have helped me to get started too.
This is my first guide so any help/feedback would be greatly appreciated.
Estimated difficulty: 3/10
Offline: 12 (200)
Approximate time to 200: around 5 hours
Minimum number of playthroughs needed: 1
Number of missable achievements: 0
(Some medals may be missable but with the level select function no achievements are really 'missable')
Glitched Achievements: none
Do Cheat Codes disable achievements? No cheats
Hydrophobia is quite an easy game and has no difficulty achievements so the game can be played from start to finish on easy and still be 200G'd. Only one play through is required as long as you use your auto saves wisely. If any collectable or medal is missed you can start a new game or load the start of any chapter and you will still have all of the collectables and medals you had before.
This should be your first and only playthrough of the story. The game and all achievements are fairly easy on hard difficulty but as there are no achievements for difficulty just go ahead and start on easy if you want to get through the game quicker.
There are 55 documents, 17 objects and 47 medals, all which are needed for achievements. There is a great guide by StarsRPD on how to get them all here http://www.xbox360achievements.org/f...d.php?t=293046
if you are having trouble with finding something then there are also achievement hunter videos on youtube of the entire game.
There are 5 misc medals which aren't found at certain parts of the story so you should take note of them before you start the game.
Complete the game using sonic rounds only
If you want to get every medal in one playthrough be sure to get any medal that needs you to use a different type of bullet and when you get the medal just kill yourself and your last checkpoint will be loaded. The game will still think you haven't fired a different type of shot but you will have the medal still.
Complete the game without failing a hack
Once you get the hang of hacking they are very easy. If you fail one just reload your last checkpoint and try again. (this may require going to the dashboard but probably not)
Spend 20 minutes under water
If you don't have it near the end just keep going underwater.
Complete challenge room without firing your gun
Complete the first 2 waves of the challenge room without firing your gun
These are both done in challenge room and have nothing to do with the story.
Once you complete the story you will unlock challenge room. In this mode you have to fight off 5 waves of 10 enemies but you gain the power of Poseidon, allowing you to manipulate water.
Just play through challenge room without firing a bullet to get two medals and the achievement Challenged
. This is very easy to do, just find a good spot on the banister that you start on where you can't get shot much, press LB to wield your Poseidon power, then hold LT to manipulate water and click in the RS to throw anything in the water across the room.
If there are any collectables or achievements you have missed just start the appropriate chapter to find them.