Wink wink, nudge nudge, say no more. You didn't see me mate, I wasn't here
Below is, as far as I'm aware, the complete list of awards that can be achieved for each platform. Some are easy to obtain, others are not so easy.
Some of these are hidden awards, so they won't appear in the awards list until you have acheived them.
Obviously I've not included how to get them all, that would be cheating
iOS
Welcome to Reading Life
BookLover
Facebook
I <heart> My Library
Once Upon a Time
Not an Open Book
Scout Leader
Free Loader
Deep Thinker
Inverted Comma
Night Rider
Word Up!
Classic Attack
Fanatic
Papillon
Total Recall
News Hound Award
Magazine Junkie Award
Extra! Extra!
Gimme Zines!
Keener
Hot off the Press
The Twain Award
Juggernaut
Page Turner
Afternoon Rush Hour
Happy Hour
Primetime
Better in Bed
Witching Hour
Graveyard Shift
Breakfast of Champions
Kill the Commute
Sleeping In
I Eat Books for Lunch
Playing Hooky
Milk and Cookies
Holiday Cheer
Out with the Old
The New You
Magic Kobo eReader
LOLz
Instapaper
Pressed for Details
To a Million and Beyond!
The Game’s Afoot
Lost in Austen
Off the Wall
Quoth the Maven
All You Can Eat
Sun, Sea, Sand, Kobo
Spirit of Portland
Time Lord
Highly Decorated
Fully Loaded
Sneaky Reads
Kobo Touch
Welcome to Reading Life
BookLover
Facebook
I <heart> My Library
Once Upon a Time
Not an Open Book
Scout Leader
Inverted Comma
Night Rider
Word Up!
Papillon
Juggernaut
Page Turner
Afternoon Rush Hour
Happy Hour
Primetime
Better in Bed
Witching Hour
Graveyard Shift
Breakfast of Champions
Kill the Commute
Sleeping In
I Eat Books for Lunch
Playing Hooky
Pressed for Details
All You Can Eat
Highly Decorated
Android
Welcome to Reading Life
Facebook
I <heart> My Library
Once Upon a Time
Not an Open Book
Scout Leader
Free Loader
Deep Thinker
Inverted Comma
Night Rider
Fanatic
Papillon
Total Recall
The Twain Award
Juggernaut
Page Turner
Afternoon Rush Hour
Happy Hour
Primetime
Better in Bed
Witching Hour
Graveyard Shift
Eat It (NB: different name from other platforms)
Kill the Commute
Sleeping In
I Eat Books for Lunch
Playing Hooky
LOLz
Off the Wall
Quoth the Maven
All You Can Eat
Fully Loaded
Note: I think that the Android awards will also apply to the Kobo Vox
Other
Bon Temps
Fangtasia
Hotel Carmilla
Dead Reckoning
Queen Bee
Secret Keeper
Scandal Sheet
Twisted
Blinged Out
Total Closer
Just The Highlights
Potent Quotables
Note: These are awards not tied to a specific platform. I can say for certain they are acehviable on iOS.