Crystal Cosmos Achievement Guide

Amethyst Kingdom

Finish Level Three

Citrine Cavern

Finish Level Four

Dark Victory

Gempocalypse

Get a 200 kill streak

Topaz Master

Get an S rank in Level Six

Topaz Temple

Finish Level Six

Stone Master

Stone Graveyard

Sapphire Ocean

Finish Level One

Sapphire Master

Get an S rank in Level One

Ruby Space

Finish Level Seven

Ruby Master

Get an S rank in Level Seven

Obsidian Master

Get an S rank in Level Eight

Obsidian Keep

Finish Level Eight

Gemtastrophe

Get a 150 kill streak

Gemcutter

Get a 50 kill streak

Gembreaker

Get a 100 kill streak

Fully Polished

Buy every upgrade

Emerald Sky

Finish Level Two

Emerald Master

Get an S rank in Level Two

Diamond Master

Get an S rank in Level Five

Diamond Factory

Finish Level Five

Citrine Master

Get an S rank in Level Four

Bright Victory

Amethyst Master

Get an S rank in Level Three