Nemesis pilots:
Successfully complete amateur, expert, or master modes with each of the seven original unlocked pilots to unlock their nemesis.

Ka Hekili:
Successfully complete master mode with each of the seven original unlocked pilots to unlock Ka Hekili.

Kutoo:
Successfully complete master mode with Ka Hekili to unlock Kutoo.

Easter Eggs:
Successfully complete expert mode with each nemesis pilot (bottom row) to unlock the eight Easter Eggs.

Redshift mode:
Successfully complete master mode with every pilot to unlock Redshift mode.