Initiated 
Complete the Initiation mission.GLITCHED TROPHY WARNINGGo to "Play Now" then select "Initiation" at the bottom of the playlist. This is a tutorial which will introduce you to the various gadgets and weapons in the game, beat it then the trophy will pop.
According to a few people on these fourms, this trophy has glitched on them and will not unlock. As of yet, to my knowledge, there is still no known solution.
Slap Happy 
Kill 50 enemy players using the panic-slap melee attack. For this you must play Psych Warfare. When the enemy team plants the battery, hide and don't disconnect it. Your screen will then go all spinny and wobbly and you won't be able to use your weapon, you have 30 seconds to get as many kills as you can. Be careful though as the enemies can see you on their radar and their bullets will push you back making it hard to attack them.
I recommend the following setup:
Body Type – Nimble/Tough
Gadget – Roller skates
This will help you move quicker but still take a decent amount of damage before you get killed.
Prestigious Accept your first Promotion. Total XP needed for level 100 -
2,500,000This will take some time to get and will most likely be the last trophy you get if you followed the Road Map. I highly recommend using different weapons and doing all the challenges with them as well as the gadget challenges and item challenges.
I found this glitch the other day and it 100% works every time
.
This glitch will give you 31,500 XP every time!
http://www.youtube.com/watch?v=HZzyW_Ziyu4
Thanks to
DefectivePanda for the video guide (Me
lol).
TEXT GUIDEStep 1. Search or a match
Step 2. Finish the match
Step 3. Quit back to the main menu
Step 4. Quit the game via the PS Button
Step 5. Start the game back up
Step 6. Bask in the success of free xp!
Gearhead Complete all feats related to a particular gadget or support item. I used the Targeting Goggles to get this trophy as there are only 2 related challenges, target 1,000 enemies and kill 1,000 targeted enemies. Once you do all the challenges, your trophy will pop.
You can also try using the motion mine which is probably much easier
1,000 enemies targeted.
500 mines deployed.
Shower of Gold
Earn 50 gold medals in Challenge mode. In these challenges you will be tasked with a series of goals to complete. There are actually more than 50 challenges but you can just do the Basic and Intermediate sections of each map. Here are all the videos I made for the challenges needed to obtain the trophy.
(See the bottom of the page for a video on each challenge)
Kill Crazy Earn a 10-kill streak
This will be a hard trophy for you if you're not very good at the game as it's very skilled and luck based. I found the following set-up very helpful and it made getting a 10-kill streak much easier:
Body Type – Burly/Mighty
Ready Weapon – Shredder
Backup Weapon – Gatekeeper
Support Item – Body Armour
Gadget – Ninja Smoke Bomb
Fun Fact 1 – Wallflower
Fun Fact 2 – Marksman
Rampage – Kill Crazy
Thanks for Playing! Finish one match of Gotham City Impostors. Do as you are told and play your first match!
Nemesaurus Become a Nemesis 50 times. This will come over time, you need to kill the same enemy a set amount of times to get this but if you are good you will get it somewhere around level 50/60.
If you are having trouble getting nemesis, use the loadout I described in the
Kill Crazy trophy Description.
Customizer Unlock any locked loadout or costume item. Simple trophy. As you rank up you will get an unlock for weapons and Mods, just use one of these and you shall get your trophy.
Weapon Specialist Complete all feats related to a particular weapon. Choose the weapon you feel the most comfortable with and complete the following challenges:
1,000 kills
500 Headshots
25 B.O sniffer kills
45 Extended Magazine kills
20 Muzzle Break kills
30 kills with the Penetration ammo against enemies with armour
75 Red Dot kills
60 Reflex Sight kills
These are the challenges for all Light Machine Guns and Assault Rifles. Some weapons have fewer challenges such as the Bear-Stalker.
Hero of the Hour Turn the tables in Fumigation when the enemy team's victory is imminent. When the enemy team's % is around 95%, go mental and capture as many as you can. This will be a lot easier if you do it with a few friends. (More information/tips needed).
Total Victory Win each game mode in Ace Chemical, Amusement Mile, Crime Alley, Gotham Power and The Docks. For this trophy you need to win a match in each game mode on each map making a total of 15 wins.
