Descent and Growth modes...
	Various Steam Achievements...

To unlock Descent, complete Transition or, score 500,000 points in one play of Transistion. The same goes for Growth by completing Descent, or scoring at least 500,000 on Descent.

Achievement	How to unlock
Adept	Achieved a multiplier of 50 in Normal difficulty.
Beat.master	Block 10,000 Beats.
Beginning	Watched the hidden cutscene.
Bit.tripper	Register a high score on the leaderboards.
Challenge complete	Block all Beats during a Challenge.
Challenge master	Block all Beats in all Challenges.
Descent complete	Beat Descent in Normal difficulty.
Endurance gamer	Beat the game in one sitting without getting a Game Over.
Epic fail	Miss a Beat with an extended Paddle.
Flawless descent	Got a PERFECT score in Descent.
Flawless growth	Got a PERFECT score in Growth.
Flawless transition	Got a PERFECT score in Transition.
Gifted	Achieved a multiplier of 100 in Normal difficulty.
Growth complete	Beat Growth in Normal difficulty.
Juggle master	Chained 500 Beats.
Juggler	Chained 100 Beats.
Multi tasker	Chained 200 Beats.
Old school skills	Escaped nether mode.
Progress	Beat the game on Normal.
Sixth sense	Beat a level using the Razer Sixense Controller.
Sunbathing	Be perfect in Transition up to the first intermission.
Transition complete	Beat Transition in Normal difficulty.