Here is the full list of all 44 Will To Live Online achievements.
Kill the Rat King
Kill 100 enemies with a handgun
Collect 500 mushrooms
Achieve 100% mastery of shotguns
Achieve 100% mastery of knives
Achieve 100% mastery of handguns
Achieve 100% mastery of submachine guns
Achieve 100% mastery of assult rifles
Join to the Black Sunset clan
Join to the Confederation clan
Fall to the death
Hit from the shotgun at distance of 75 meters
Hit from the shotgun at distance of 100 meters
Hit from the handgun at distnace of 100 meters
Hit from the handgun at distance of 200 meters
Hit from the handgun at distance of 300 meters
Hit from the submachine gun at distance of 100 meters
Hit frim the submachine gun at distance of 200 meters
Hit from the submachine gun at distance of 300 meters
Hit from the assault rifle at distance of 200 meters
Die for the first time
Die 100 times
Die by the mine explossion
Achieve 100% mastery for all weapon types
Kill 100 enemies with a grenades
Kill 1000 enemies with a grenades
Kill 10000 enemies with a grenades
Kill 100 enemies with a gauge shots
Kill 1000 enemies with a gauge shots
Kill 10000 enemies with a gauge shots
Kill 100 enemies with a mine
Kill 1000 enemies with a mine
Kill 10000 enemies with a mine
Kill 1000 enemies with a handgun
Kill 10000 enemies with a handgun
Place mobile storage
Kill enemy with a handgun by headshot
Kill enemy with a submachine gun by headshot
Kill enemy with a sniper rifle by headshot
Kill enemy with a assault rifle by headshot
Use Awl stimulator 200 times
Die 1000 times
Die 10000 times
Hit from the sniper rifle at distance of 250 meters