Here is the full list of all 20 Hentai Loli vs Pedobear achievements.
Find Bridge
Cleaner
Assassin
Soldier
Sniper
LaraCroftova
Find Forest
Find SkyScraper
PedoBearKiller
Deadly
Find Factory
Sharp
Find Airport
Precision
Sheriff
Gunslinger
Find Stadium
Tough
Find Tram
Find Downtown