Here is the full list of all 24 Beer Ranger achievements.
Complete Quest Mode
Complete Brotherhood Mode
Complete Quest NS Mode
Complete Adventure Mode
Complete Doom Mode
Complete Original Mode
Die 10 times in any mode
Die 100 times in any mode
Die 1000 times in any mode
Kill 5 Orcs
Kill 50 Orcs
Kill 500 Orcs
Destroy 5 Skeletons
Destroy 50 Skeletons
Destroy 500 Skeletons
Get 10 Beer Mugs
Get 100 Beer Mugs
Get 1000 Beer Mugs
Collect 1 Secret Gem
Collect 3 Secret Gems
Collect 7 Secret Gems
Unlock Kal'Rataf - the Demonic Dwarf
Unlock Falgrim - the Dwarf King
Complete Menu Level