Here is the full list of all 21 Crazy Max VR achievements.
Kill 200 Jill enemies
Kill 200 Skeletons
Kill 200 Dentists
Kill 200 Worm Grubs
Kill 200 Flying Skulls
Kill 200 Weresnakes
Kill 200 Spiders
Kill 200 Mummies
Kill 200 Ratkins
Kill the Butcher
Kill the Deathstar
Kill the Giant Worm
Kill Kong
Kill four Giant Scorpions
Kill two Golems
Kill a Crawler
Rescue the planet and win all levels
Play all levels on Hardcore
Play all levels on Nightmare
Destroy all explosive barrels
Collect all secrets