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