Here is the full list of all 37 High Noon VR achievements.
Collect and upgrade all weapons
Kill bitch boss
Kill all bosses
Kill fatty boss
Kill 10 enemies with less then 1% of HP
Complete 20 quests
Make 10 gun upgrades
Make 5 gun upgrades
Kill doctor boss
Collect all weapons
Kill 100 enemies with gatling
Finish the wave with using a gatling gun and without overheating it
Kill 100 enemies with dynamite
Kill 100 enemies with rifle
Kill 100 enemies with shotgun
Upgrade weapon to max lvl
Achieve x15 combo
Kill ratboy boss
Takeout 100 hats without killing enemies
Spend $10000
Destroy 1000 destructibles
Kill 3 enemies with one shotgun shot
Make two headshots with one bullet
Kill 1000 enemies
Blow 10 destructibles with one dynamite
Spend $2000
Make gun upgrade
Kill 250 enemies
Destroy 100 destructibles
Kill 100 enemies with revolver
Score kill with every bullet in cylinder
Kill 50 enemies
Destroy 10 destructibles
Spend $500
Kill 100 enemy high in the air
Kill flying enemy with dynamite
Make 10 headshots in a row