The City of Gold's door anywhere

Verified against the spelunky.ai port v0.1.12 on 28 October 2026.

Level 14 always has the City of Gold's door, and the roll that places it asks for one thing of the block under it: open space above. It doesn't ask whether the player can reach that space, so the door can be sealed in rock that has to be broken open, and it doesn't skip Kali's altar, so the door can stand on one, and make that half of the altar as hard to break as the door's block always is.

Level 14 loads with the gold door on the left half of Kali's altar, at the top of the level. The player walks over and stands on the altar's other half, beside the door ^[1].

scrEntityGen goes over the Temple's blocks one by one, and on level 14, until the door is made, each block outside a shop with open space above it, but for the top few rows, takes the door's roll:

        if (y > 32 and not collision_point(x, y-16, oSolid, 0, 0) and global.genGoldEntrance and not global.madeGoldEntrance)
        {
            if (rand(1,global.goldChance) == 1)
            {
                instance_create(x, y-16, oGoldDoor);
                invincible = true;
                global.madeGoldEntrance = true;
            }
            else global.goldChance -= 1;
        }

goldChance starts each game at 160 ^[2], and if no block wins, the door goes on the first block with open space above it ^[3]. Either way, one free tile is all the door needs: the space above the block can be a pocket in the rock, with no way into it. The Spear Traps' roll, the else beside it, skips trees and the altar (type != "Altar") ^[4]; the door's doesn't, and the block under it, an altar half included, gets invincible = true, which explosions and the Mattock spare ^{[5] [6]}. But the other half's destroy event destroys every altar half, with oSacAltarLeft, which takes in its child, the right half ^[7], and the door's half still crumbles when the floor under it goes, once it's within the view ^{[8] [9]}.

Reach level 14 and look for the door. Most levels have it in the open; some seal it in a pocket of rock, which a bomb or the Mattock opens from above or beside. Waiting at level 13's exit before taking it rerolls level 14, and a sweep of 3,757 level 14s rerolled that way put the door on the altar in 15, 1 in 77 of the 1,156 with an altar ^[9]. The replay of the clip rerolls level 14 with seed 1: the door stands on the altar's left half, which is invincible, and the player stands on the right half beside it ^[10]. With seed 9 another level 14 puts the door in a 20-tile pocket under the floor of the room above, and the run blows its way in with two bombs and carries the Sceptre into the door, which opens ^[11]. Reaching the City of Gold walks the rest of the way in.

The spelunky.ai port reproduces it exactly: it's in docs/quirks.md's list of the 1.1 source's bugs ^[9], and the oracle's fingerprints of the replays pin the door's place, the altar's invincible and the sealed door's pocket. No option turns it off.