The Randomizer includes multiple game modes which can be selected from the New Game screen.

Normal Randomizer

The totally normal Randomizer experience

Entrance Randomization

The normal Randomizer, except every level transition is now shuffled to take you to a different level transition compared to normal. For more information, look here.

Horde Mode

Try to survive against waves of enemies in the Cathedral, with items spawning between waves.

Randomizer Lite

The randomizer, except not quite as much stuff has been randomized.

Zero Rando

As close to vanilla as possible, with Randomizer quality of life improvements and extra functionality (like Bingo or Crowd Control)

Serious Sam Mode

The Randomizer experience, except enemy quantities have been cranked up, damage multipliers are decreased, and maximum health has been increased

Speedrun Mode

Randomizer, optimized for a slightly more consistent speedrun experience

WaltonWare

The randomizer optimized for extremely short bingo games. You will start on a random map, you'll instantly win after completing one bingo line, all bingo goals should be completable within 1 mission, all bingo goals are scaled down so they only need to be done once, and there are 5 free spaces (so all lines only require 4 goals)

WaltonWare Entrance Rando

Both game modes combined for extra craziness!