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