Red Death (PC)

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Easy "DEEPER!" Achievement

In stage two, the jet mini-boss will drop a laser and a missile power-up upon dying. Pick up the missile power-up and don't die, or you will lose it. Keep playing until you face the pharaoh mini-boss in the same stage and beat him. Right after the fight, there will be a brain-looking thing on the right side of the screen. Shoot the dark door-looking thing coming out of the brain and it will open as an entrance to a secret level. You will also get "HAVE YOU SEEN IT?" achievement in the secret level.

Various Steam Achievements

Complete the indicated task to unlock the achievement.

AchievementHow to unlock
A NEW GAME MODE!Arcade Mode unlocked!
DEEPER!That's a secret! Don't tell anyone!
DO IT FOR HER!Someone to care about!
FORGET IT!Now we know!
GIT GUD!Die 5 times without closing the game!
HAVE YOU SEEN IT?I saw something flashing!
HERO!...and no one will know!
IT'S OK!It's a bullet hell afterall!
MANKIND LAST HOPE!You better be ready!
MY GUN IS BIGGER!Meet the first boss.
STILL GOING?Survive 7 rounds in arcade mode!
THE GAME GOES ON!Survive 5 rounds in arcade mode!
WHO IS HE?We'll never know!
YOU ROCK FOR REAL!Survive 10 rounds in arcade mode.
YOU ROCK!Finally at level 2!