The slot machine in BloodBox Roblox appears to be a hidden/secret location , and one guide says it’s found by going through a painting , then a vent , then turning left to reach it. Another slot-machine guide for a similar Roblox casino setup says secret machines can be tucked behind objects or in hidden rooms, so the exact spot may depend on the specific BloodBox/Blood Zone version you’re in.

What to try

  • Look for a painting you can enter.
  • Check nearby vents and hidden side rooms.
  • If the game has a club/lounge/casino area , the machine may be inside a restricted section.

Quick note

The name in your question may be referring to BloodBox or Blood Zone , and the available results point more strongly to Blood Zone-style hidden slot locations than a clearly documented BloodBox map marker.

TL;DR: Start by searching near a painting and vent path , because that’s the clearest reported route to the slot machine.