Here is the difficulty of the awards(only what I think)
VE=veryeasy
E=easy
M=medium
H=hard
VH=veryhard
First Row:
VE~ Participation: Awarded for splatting a Gloople (Bronze Medal)
VE~ Lemony: Awarded for splatting a Stickie (Bronze Medal)
VE~ Self Preservation: Awarded for splatting a Biter (Bronze Medal)
VE~ Mixed Blessing: Awarded for splatting a Meltie (Bronze Medal)
E~ Replication: Awarded for splatting a Clutter (Bronze Medal)
VE~ Black Mark: Awarded for splatting an Inkie (Bronze Medal)
E~ Three Licks: Awarded for splatting an Oozle (Silver Medal)
M~ Hairball: Awarded for splatting a Fuzzle (Silver Medal)
M~ Opportunist: Awarded for splatting a Sharp (Silver Medal)
M~ Cold Front: Awarded for splatting a Frostie (Silver Medal)
M~ Defuse: Awarded for splatting a Torchie (Silver Medal)
H~ Immunology: Awarded for splatting an Amalgam (Silver Medal)
M~ Armor Piercer: Awarded for splatting a Gray (Gold Medal)
M~ Excavation: Awarded for splatting a Grinder (Gold Medal)
H~ Bravery: Awarded for splatting a Horror (Gold Medal)
H~ Enforced Gravity: Awarded for splatting a Void Eater (Gold Medal)
M~ Red Queen: Awarded for splatting a Queen (Gold Medal)
Second Row:
VH~ Epic: Awarded for splatting a Razor Queen (Gold Medal)
E~ Preventative Measures: Awarded for splatting two Glooples, while forming together (Bronze Medal)
VE~ Good Combo: Awarded for splatting 2 glooples in a single swing (Bronze Medal)
E~ Nice Combo: Awarded for splatting 3 glooples in a single swing (Bronze Medal)
E~ Sweet Combo: Awarded for splatting 4 glooples in a single swing (Silver Medal)
M~ Awesome Combo: Awarded for splatting 5 glooples in a single swing (Silver Medal)
M~ Sick Combo: Awarded for splatting 6 glooples in a single swing (Gold Medal)
H~ Incredible Combo: Awarded for splatting 7 glooples in a single swing (Gold Medal)
VH~ Unbelievable Combo: Awarded for splatting 8 glooples in a single swing (Gold Medal)
E~ Academic: Awarded for spending 10 minutes in Practice Mode (Bronze Medal)
E~ Solid Swing: Awarded for splatting 20 bounty worth of glooples in a single swing (Bronze Medal)
E~ Big Swing: Awarded for splatting 50 bounty worth of glooples in a single swing (Bronze Medal)
M~ Great Swing: Awarded for splatting 75 bounty worth of glooples in a single swing (Silver Medal)
M~ Huge Swing: Awarded for splatting 100 bounty worth of glooples in a single swing (Silver Medal)
M~ Massive Swing: Awarded for splatting 150 bounty worth of glooples in a single swing (Gold Medal)
M~ Brutal Swing: Awarded for splatting 200 bounty worth of glooples in a single swing (Gold Medal)
H~ Killer Swing: Awarded for splatting 300 bounty worth of glooples in a single swing (Gold Medal) (Just kill a Grinder and 2 Glooples and make a score of 306)
Third Row:
E~ Victory!: Awarded for clearing a Small Single Nest (Bronze Medal)
M~ Mad Skills: Awarded for clearing a Big Single Nest (Silver Medal)
H~ Bragging Rights: Awarded for clearing a Huge Single Nest (Gold Medal)
VE~ Persistant: Awarded for being killed 10 times (Bronze Medal)
VE~ Determined: Awarded for being killed 25 times (Silver Medal)
VE~ Dedicated: Awarded for being killed 50 times (Silver Medal)
VE~ Tireless: Awarded for being killed 100 times (Gold Medal)
E~ Bloodletter: Awarded for being killed 5 different ways (Bronze Medal)
M~ Gorehound: Awarded for being killed 10 different ways (Silver Medal)
VH~ Splatterbait: Awarded for being killed 15 different ways (Gold Medal)
VE~ Test Drive: Awarded for playing 5 minutes total (Bronze Medal)
VE~ Kinda Fun: Awarded for playing 10 minutes total (Bronze Medal)
VE~ Casual Interest: Awarded for playing 20 minutes total (Bronze Medal)
VE~ Spare Time: Awarded for playing 30 minutes total (Silver Medal)
VE~ Commitment: Awarded for playing 45 minutes total (Silver Medal)
VE~ Addiction: Awarded for playing 60 minutes total (Gold Medal)
E~ Completitionist: Awarded for playing 90 minutes total (Gold Medal)
Fourth Row:
E~ Novice: Awarded for reaching a score of 100 in any mode (Bronze Medal)
E~ Apprentice: Awarded for reaching a score of 200 in any mode (Bronze Medal)
E~ Hunter: Awarded for reaching a score of 350 in any mode (Bronze Medal)
E~ Warrior: Awarded for reaching a score of 500 in any mode (Bronze Medal)
M~ Adept: Awarded for reaching a score of 750 in any mode (Silver Medal)
M~ Expert: Awarded for reaching a score of 1000 in any mode (Silver Medal)
H~ Champion: Awarded for reaching a score of 1500 in any mode (Silver Medal)
H~ Elite: Awarded for reaching a score of 2000 in any mode (Gold Medal)
VH~ Hero: Awarded for reaching a score of 2500 in any mode (Gold Medal)
VH~ Legend: Awarded for reaching a score of 3000 in any mode (Gold Medal)
E~ Alertness: Awarded for surviving 1 minute in Bounty Run Mode (Bronze Medal)
E~ Danger Sense: Awarded for surviving 2 minutes in Bounty Run Mode (Bronze Medal)
E~ Threat Assessment: Awarded for surviving 3 minutes in Bounty Run Mode (Silver Medal)
M~ Sharp Reflexes: Awarded for surviving 4 minutes in Bounty Run Mode (Silver Medal)
M~ Keen Instincts: Awarded for surviving 5 minutes in Bounty Run Mode (Silver Medal)
H~ Nerves of Steel: Awarded for surviving 7 minutes in Bounty Run Mode (Gold Medal)
VH~ Untouchable: Awarded for surviving 10 minutes in Bounty Run Mode (Gold Medal)
Fifth Row:
E~ Exterminator: Awarded for splatting 1000 Glooples (Bronze Medal)
E~ Custard: Awarded for splatting 100 Stickies (Bronze Medal)
E~ Tooth Collector: Awarded for splatting 70 Biters (Bronze Medal)
E~ HazMat: Awarded for splatting 50 Melties (Bronze Medal)
E~ Litterbug: Awarded for splatting 50 Clutters (Bronze Medal)
E~ Paint it Black: Awarded for splatting 30 Inkies (Bronze Medal)
M~ Size Matters: Awarded for splatting 15 Oozles (Bronze Medal)
M~ Tribble: Awarded for splatting 20 Fuzzles (Silver Medal)
M~ Patience: Awarded for splatting 10 Sharps (Silver Medal)
H~ Anti-Freeze: Awarded for splatting 6 Frosties (Silver Medal)
H~ Bomb Squad: Awarded for splatting 6 Torchies (Silver Medal)
M~ Dismantler: Awarded for splatting 5 Grays (Silver Medal)
H~ Purifier: Awarded for splatting 15 Amalgams (Silver Medal)
H~ Fault Line: Awarded for splatting 4 Grinders (Gold Medal)
VH~ No Fear: Awarded for splatting 3 Horrors (Gold Medal)
VH~ Physics Defied: Awarded for splatting 3 Void Eaters (Gold Medal)
M~ Queensbane: Awarded for splatting 3 Queens (Gold Medal)
Sixth Row:
VH~ Merciless: Awarded for splatting 2 Razor Queen
VE~ Absentee: Awarded for pausing for 2 full minutes (Bronze Medal)
VE~ Picky: Awarded for changing to a new song five times in one play (Bronze Medal)
H~ Jackpot!: Awarded for scoring a triple 7 score (Silver Medal) (777 score)
E~ Unfortunate: Awarded for being killed by a Biter as it leaps from offscreen (Bronze Medal)
E~ Pacifist: Awarded for not swinging for 30 seconds (Bronze Medal)
VE~ Bully: Awarded for forcing a Clutter out of the screen without swinging (Bronze Medal)
E~ Zen Master: Awarded for getting a kill while blinded (Silver Medal)
E~ Passive Aggressive: Awarded for knocking a sharp out of bounds (Silver Medal)
E~ Guerilla Tactics: Awarded for knocking a sharp into another gloople (Silver Medal)
M~ Clean Shave: Awarded for shaving of all ones Fuzzle's fuzz 3 times (Silver Medal)
M~ Fire Fighter: Awarded for putting out 10 little Torchie fires (Silver Medal)
M~ Duelist: Awarded for dodging or deflecting 5 of a Queen's attacks (Silver Medal)
M~ Blade Master: Awarded for scoring 10 consecutive combo kills (Gold Medal)
H~ Impressionist: Awarded for splatting 4 different types of Glooples in a single swing (Gold Medal)
VH~ ******: Awarded for clearing out a nest without a single error (Gold Medal)
M~ Purple Heart: Awarded for clearing a nest with a Clutter still attached on you (Gold Medal)
Last Row:
M~ Blindsight: Awarded for surviving being blinded by an Inkie (Bronze Medal)
M~ Frostbitten: Awarded for breaking out of Frostie ice before being killed (Bronze Medal) (Shake the ice off, by moving your cursor right and left quickly)
M~ Demolition: Awarded for surviving an explosion (Silver Medal)
M~ Burn Ward: Awarded for being lit on fire and managing to survive (Gold Medal) ( Get into Stickie goo)
E~ Accident Prone: Awarded for getting bumped 30 times (Bronze Medal)
E~ Friendly: Awarded for being completely bogged down in Clutters (Bronze Medal)
E~ Dirty Job: Awarded for spending a total minute stuck in Stickie goo (Bronze Medal)
E~ Till It Breaks: Awarded for sparking against a hard target 50 times (Silver Medal) (Wall Reward, Grinder or Gray for example)