Some unlockables needs tasks to be done,like collecting all orbs in a level, or beating the game.

Unlockable	How to unlock
Fast Stamina Recharge	Complete Game + Paris 29/60 Orbs.
Hard Difficulty	Complete the game..
Play as Albedo	Complete Game + All 57/330 Orbs.
Start with 4 Lives	Complete Game + Rome 28/30 Orbs.
Strong Dash Attacks	Complete Game + Venezuela 0/60 Orbs.
Strong Ranged Attacks	Complete Game + China 0/60 Orbs.
Ultimatrix Regeneration	Complete Game + Tokyo 0/60 Orbs.
Unstoppable	Complete Game + Devil's Tower 0/60 Orbs.