Here is the full list of all 19 Tokyo 42 achievements.
Complete all missions and get all collectables
Reach highest level in copdrop
Complete all ronin missions
Complete all roninja missions
Complete all ninja missions
Collect all the weapons
Collect all cash drops
Unlock all secret portals
Complete the story
Collect all cat skins
Collect all coats
Find all Tokyo Tourism sights
Complete Act 2
Kill three enemies with one grenade
Complete the bike race
Get a grenade through the hoop
Complete Act 1
Kill yourself with a grenade
Complete Intro