Stadium

The stadium is unlocked upon reaching 15 endorsements and is the 3rd mechanic under the infinity tab. It contains 6 (or 12 in extreme) different challenges which give various rewards to help the player progress. Each challenge's difficulty scales based off the number of challenges completed before it with a changing goal and a new effect being added for each.

Spaceon
Reward: inf1;1 is stronger based on your Rockets.

Solaris
Reward: Superscaled Rank scaling starts later based on your cadavers.

Infinity
Reward: The Rocket Fuel effect is twice as powerful.

Eternity
Reward: Endorsements & Ascension Power make Ranks boost Time Speed.

Reality
Reward: Time Cubes are thrice as powerful.

Drigganiz
Reward: Pathogen Upgrades are 0.75% stronger for every achievement you have.

Extreme Stadium Challenges
These challenges are available only in extreme mode and scale independently from the standard 6 challenges.

Flamis
Reward: Superscaled Rank Cheapener scaling is 90% weaker

Cranius
Reward: Knowledge gain is boosted by second row Stadium Completions.

Spectra
Reward: Rank Cheapeners use a weaker cost formula based on their amount.

Aqualon
Reward: All pre-Infinity resources are generated 3x faster.

Nullum
Reward: All perks are 25% stronger.

Quantron
Reward: Pathogen Upgrades are stronger based on your Coal.