Heidi's Bier Haus

Heidi's Bier Haus is a Class II machine — that changes the question

Under the Indian Gaming Regulatory Act of 1988, Class II covers bingo and games that are technologically aided bingo. This machine is legally a bingo terminal. Every play enters a bingo game shared with other players on the same system, and the outcome is decided by that draw — the spinning reels are an animation that reveals a result already determined.

That is why "what is the RTP of this machine" doesn't map cleanly onto a Class II title. Return depends on the bingo pool, the prize schedule and how many terminals are competing in each draw — none of which live inside this cabinet.

Class II is what allows tribal properties to operate without a Class III compact with the state, which is why the same game title often exists in both a Class II and a Class III build with different maths behind identical artwork.

If you have played Heidi's Bier Haus at two properties and it felt different, this is frequently why — you may have been playing two different regulatory builds of the same title.