Walking up to the machine and bumping it will cost you one Penny, and roll the slots. You have no control over the results.
The symbols include pills, bombs, hearts, keys, coins, flies, and technically dollar bills. Getting 3 Flies will result in either you getting a Pretty Fly or a black enemy fly being spawned in the room from the machine. Getting 3 Dollars (The symbol can't show up in other rolls, but the reels show it before the machine is destroyed) will make the machine self-destruct and produce a Dollar, a collectible that sets your money to 99 cents.
It is possible to find bombs (regular, troll, or 1+1 free), hearts (half heart, full heart, or soul heart), keys (normal or golden), coins (penny or nickle), pills (any color), flies (Pretty Fly or black enemy fly), and dollar bill. Coins, Hearts and Bombs can all appear two at a time.
If the Slot Machine is caught in an explosion of any kind, it will be destroyed, dropping several items such as bombs, coins, keys, pills, hearts, or even gold chests.
|1 Half Heart||8/200||4%|
|Black Fly Enemy||5/200||2.5%|
|1 Soul Heart||5/200||2.5%|
|Pretty Fly||3/200||1.5%||Does nothing if you already have 3 orbitals (Pretty Fly, Halo of Flies, or Guardian Angel)|
|Super Troll Bomb|
|Explosion||2/200||1%||Machine is destroyed leaving a few items. This shoves you away from the machine if you are standing very close to it.|
|1 Penny & 1 Nickle||1/200||0.5%|
|A Dollar||1/200||0.5%||Sets money to 99c and causes the machine to explode.|
- Note that these are approximate and determined by community play-testing.