Here is the full list of all 50 DJ Hero 2 trophies - there are 42 bronze, 5 silver, 2 gold and 1 platinum.
Collect all other Trophies.
Reach online grade 10.
Set up and play a 10 mix setlist in Quickplay, earning at least 4 stars for each mix.
Complete 30 Online Battles (in any Online Battle mode).
Win 50 Online Battles (in any Online Battle mode).
Successfully perform 25,000 scratches (in any mode except Party Play).
Successfully perform 20,000 crossfades (in any mode except Party Play).
Play all of the DJ Battle mixes (online or offline).
Beat a friend's score on any of the leaderboards.
Win all the DJ Battle setlists in Empire mode.
Get an A for Freestyling in any mix (in any mode except Party Play).
Earn 5 stars for every mix at Expert difficulty (in Quickplay, Empire or Star Battle).
Play your opening night in Empire mode.
Earn 5 stars for any mix at all difficulty levels (in Quickplay, Empire or Star Battle).
Reach online grade 50.
Calibrate your system for DJ Hero 2.
Play a mix in Quickplay with another DJ and a Vocalist (in local play only).
Hit 100% of the vocal notes in a mix (in any mode except Party Play).
Set up and save 3 setlists in Quickplay.
Set your own online Tag and Medal.
Earn 12 stars in DJ Shadow's setlist in Empire mode on Medium difficulty or above.
Earn 12 stars in DJ Shadow's setlist in Empire mode on Hard difficulty or above.
Earn 12 stars in DJ Shadow's setlist in Empire mode on Expert difficulty.
Perform 4 720° rewinds in a single mix, on any difficulty level without dropping your multiplier (in any mode except Party Play).
Perform Vocals in every mix that supports them (in any mode except Party Play).
Win 5 Star Battles online.
Win a Checkpoint Battle by knocking out the other player (online only).
Win 10 Online Battles against players of a higher grade (in any Online Battle mode).
Play Accumulator and win 10 mixes (or single mix battles) with a streak of over 50 (online only).
Play Streak and win 6 mixes (or single mix battles) by 20 streak margin (online only).
Win 10 Checkpoint mixes (or single mix Battles) by a margin of 3 checkpoints or more (online only).
Beat all the employee DJs in Checkpoint Battles in Empire mode.
Play 5 mixes directly from Hero Feed Challenges.
Unlock all the Empire bonus mixes.
Complete 6 of the 'New To DJ Hero 2' Tutorial lessons.
Apply 'Like' tags to 10 mixes and play these mixes (in any game mode except Party Play).
Earn 33 stars (in Quickplay, Empire or Star Battle).
In Empire mode complete 3 Setlist Challenges.
Successfully perform 50,000 taps (in any mode except Party Play).
Only crossfade to the left in all Freestyle sections in any mix (in any mode except Party Play).
Activate 6 rewinds in Show Me Love (Stonebridge Radio Edit) / I'm Not Alone mix (in any mode except Party Play).
Fail to 5 star Galvanize on Expert difficulty (in Quickplay, Empire or Star Battle).
5 star Galvanize on Expert difficulty (in Quickplay, Empire or Star Battle).
In any Battle get an A for Scratching, a B for Taps, a B for Crossfading and an A for Freestyling.
Get a 400 streak in I Will Be Here / Speed Rail on Expert (in any mode except Party Play).
Get a 200 vocal streak in any vocal mix (in any mode except Party Play).
Earn at least 3 stars in each of the mixes in the Tiësto Megamix (in Quickplay, Megamixes, Empire or Star Battle).
In Empire Mode beat DJ Qbert in each of his Battle Mixes.
Unlock all the Power Decks.
View the game credits.