First level completed.

Second level completed.

Third level completed.

Fourth level completed.

When sh... Fifth level completed.

Sixth level completed.

Seventh level completed.

Completed the story mode.

Unlocked secret mode.

Completed the story mode on Xtreme mode. You are crazy, seriously.

Died 50 times.

Played coop mode.

Killed 1000 enemies.

Catch 10 powerups.

Choose new kind of weapons.

Choose one up instead of new weapon.

Unlock secret ending.

Finished the boss rush.