Turbo!

Turbo! is the third challenge on the list added on Antibirth; it is unlocked along with Cain, which is also the character on this challenge.

The game plays the same, but at a really high speed and your goal is to defeat Mom and doing so unlocks the Rune of Fehu.

Strategy[]

This is essentially a common Antibirth playthrough as Cain with shops, treasure rooms same starting items.

EVERYTHING goes faster, the game itself runs at a higher speed including animations, sequences, the timer, Temporary effects.

Cain's already high speed makes him somewhat hard to maneuver, but the bigger issue is reaction time and dodging incoming attacks and enemies.
- If you still cannot get used to the movement speed, consider reducing it a bit
- An early Bucket of Lard will reduce your speed and increase Cain's low health
Don't rush through the rooms to seize the difficulty and dangers on each, trying to speedrun them will inevitably result in you bumping on harmful obstacles.
Leaping enemies and spiders are a special menace since they reach high speeds and move suddenly, making them harder to predict.
Protective items to shrug off hits and shrinking items to avoid hits are recommended.
Items which speed down enemies like Spider Butt, The Hourglass or Stop Watch.
- In this version of the game, Stop Watch was still automatic and will trigger when entering a new room.
- Broken Watch also works, but only every forth room and have a chance to speed up the game.
Items that petrifies in the room helps like Mom's Bra.
Eraser is really useful to delete a troubling enemy like Hoppers/Leapers,
Bosses like Krampus and The Bloat are a big threat due to how quick their attacks can be.
The best strategy is getting accustomed to the speed by playing it over and over.

Turbo! is the only challenge not to be ported from Antibirth to Repentance, likely due to its similarity to SPEED!.