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