Spelunky is © 2008, 2009 Derek Yu and Mossmouth, LLC, and is used under the [Spelunky User License v1.1b](https://spelunky.ai/LICENSE.txt). spelunky.ai is an unofficial fan project, not affiliated with or endorsed by Mossmouth. The game and its assets may not be sold. Music by George Buzinkai and Jonathan Perry; sound effects made in SFXR. From Spelunky Classic 1.1, © 2008, 2009 Derek Yu and Mossmouth, LLC. # The Teleporter's old target From the spelunky.ai wiki: . Verified against the spelunky.ai port [v0.1.11](https://github.com/851-labs/spelunky/releases/tag/v0.1.11) on 28 October 2026. The Teleporter's old target is a quirk of Spelunky Classic in which a Teleporter used while a gun's shot waits takes the player back to an old spot. | Quirk | | | --------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | Status | GML + Oracle | | Where | [`scripts/scrUseItem.gml:426-458`](https://spelunky.ai/wiki/source/scripts/scrUseItem#L426-L458) | | Pinned by | `fidelity/replays/weapon-teleporter-old-target.txt` | | Row | [docs/quirks.md §1, Bugs and leftovers in the 1.1 source](https://github.com/851-labs/spelunky/blob/main/docs/quirks.md#1-bugs-and-leftovers-in-the-11-source): “The Teleporter keeps its last spot while another weapon's shot waits, and with none it stops the game.” | The [Teleporter](https://spelunky.ai/wiki/teleporter) picks a spot 4 to 8 blocks away, up or ahead, and moves the player there. It has no wait of its own between uses, but its sideways use checks the wait the guns and the [Bow](https://spelunky.ai/wiki/bow) set between shots, and skips picking a spot while one runs. It moves the player all the same, to whatever spot was picked last. ## What happens The player teleports straight up and falls back. He fires a [Shotgun](https://spelunky.ai/wiki/shotgun), swaps it for the Teleporter and uses it facing left, before the Shotgun's wait is over: it takes him straight up again, to the spot its last use picked. Used once the wait is over, it takes him five blocks left[^1]. **Clip: The Teleporter goes back to its last spot.** The player teleports straight up and falls back. He fires a shotgun, swaps it for the teleporter and uses it facing left, before the shotgun's wait is over: it takes him straight up again, to the spot its last use picked. Used once the wait is over, it takes him five blocks left. ([video](https://spelunky.ai/wiki/media/clips/quirks/teleporter-old-target/clip.mp4)) ## Why The Teleporter's spot is `tx` and `ty`. With up held it always picks one; facing left or right, only `and firing == 0`: ```gml scripts/scrUseItem.gml:427-447 if (kUp) { tx = x; ty = y - (16*rand(4,8)); while (ty < 16) { ty += 16; } } else if (not scrPlayerIsDucking()) { if (facing == LEFT and firing == 0) { tx = x - (16*rand(4,8)); ty = y; if (tx < 8) tx = 8; } else if (facing == RIGHT and firing == 0) { tx = x + (16*rand(4,8)); ty = y; if (tx > room_width - 8) tx = room_width - 8; } } ``` [`scripts/scrUseItem.gml:427-447`](https://spelunky.ai/wiki/source/scripts/scrUseItem#L427-L447), from `spelunky.gmk`, Spelunky Classic 1.1's source, © 2008, 2009 Derek Yu and Mossmouth, LLC ([Spelunky User License v1.1b](https://spelunky.ai/LICENSE.txt)). `firing` is the wait a shot starts, counted down by the player's step[^2]: 20 steps for the [Pistol](https://spelunky.ai/wiki/pistol), the [Web Cannon](https://spelunky.ai/wiki/web-cannon) and the [Sceptre](https://spelunky.ai/wiki/sceptre), 40 for the Shotgun, 10 for the Bow. The Teleporter starts none, so it only matters after a swap. Then the use moves the player to `tx` and `ty` as they were[^3]. They're the player's own variables, which two scripts besides write in his scope: checking whether a point is in a shop, and which room it's in[^4][^5][^6]. His step asks them about where he is while he holds an unpaid ware or a readied bomb arrow, and when he presses the pay key[^7][^8][^9]. So the spot is the Teleporter's last, or where he last held an unpaid ware, say. If nothing has set them on the level, the use reads an unset `tx`, an error that stops the game[^10]. ## Reproducing it Fire a gun, put it down, pick up a Teleporter and use it facing left or right, not crouching, before the gun's wait is over. The replay of the clip's staged scene, on a custom level, uses the Teleporter with up held, which moves the player 4 blocks up. He fires a Shotgun, swaps it for the Teleporter and uses it facing left with 6 steps of the wait to go: it moves him up there again. Used once the wait is over, it moves him 5 blocks left[^11]. The same scene without the first use stops on the second, on the port and the original alike, and isn't kept as a replay, as a run that stops on an error has no fingerprint. ## In the port The spelunky.ai port reproduces it exactly, the error included: it's in docs/quirks.md's list of the 1.1 source's bugs[^10], and the oracle's fingerprint of the replay pins every move. No option turns it off. ## FAQ ### Why does the Teleporter take you back where you were? A sideways use of the [Teleporter](https://spelunky.ai/wiki/teleporter) only picks a new spot once a gun's wait between shots is over. Used within it, as after swapping a [Shotgun](https://spelunky.ai/wiki/shotgun) for it, it takes the player to the last spot picked, which is often where he last teleported to. ### Can the Teleporter crash Spelunky Classic? Yes. Used sideways within a gun's wait before anything on the level has set its spot, it reads a variable that has never been set, an error that stops the game. ### Does teleporting straight up have the same problem? No. A use with up held picks a new spot every time, wait or no wait. ## See also - **Related:** [Teleporter](https://spelunky.ai/wiki/teleporter), [Pistol](https://spelunky.ai/wiki/pistol), [Shotgun](https://spelunky.ai/wiki/shotgun), [Web Cannon](https://spelunky.ai/wiki/web-cannon), [Sceptre](https://spelunky.ai/wiki/sceptre), [Bow](https://spelunky.ai/wiki/bow) ## References [^1]: Clip quirks/teleporter-old-target [^2]: [`objects/oPlayer1/step.gml:175`](https://spelunky.ai/wiki/source/objects/oPlayer1/step#L175) [^3]: [`scripts/scrUseItem.gml:448-460`](https://spelunky.ai/wiki/source/scripts/scrUseItem#L448-L460) [^4]: [`scripts/isInShop.gml:7-8`](https://spelunky.ai/wiki/source/scripts/isInShop#L7-L8) [^5]: [`scripts/scrGetRoomX.gml:24`](https://spelunky.ai/wiki/source/scripts/scrGetRoomX#L24) [^6]: [`scripts/scrGetRoomY.gml:24`](https://spelunky.ai/wiki/source/scripts/scrGetRoomY#L24) [^7]: [`objects/oPlayer1/step.gml:43`](https://spelunky.ai/wiki/source/objects/oPlayer1/step#L43) [^8]: [`objects/oPlayer1/step.gml:543-545`](https://spelunky.ai/wiki/source/objects/oPlayer1/step#L543-L545) [^9]: [`objects/oPlayer1/step.gml:1359-1361`](https://spelunky.ai/wiki/source/objects/oPlayer1/step#L1359-L1361) [^10]: Quirk 1 (docs/quirks.md) [^11]: Replay `fidelity/replays/weapon-teleporter-old-target.txt` ### Source code - [`scripts/scrUseItem.gml`](https://spelunky.ai/wiki/source/scripts/scrUseItem) - [`objects/oPlayer1/step.gml`](https://spelunky.ai/wiki/source/objects/oPlayer1/step) - [`scripts/isInShop.gml`](https://spelunky.ai/wiki/source/scripts/isInShop) - [`scripts/scrGetRoomX.gml`](https://spelunky.ai/wiki/source/scripts/scrGetRoomX) - [`scripts/scrGetRoomY.gml`](https://spelunky.ai/wiki/source/scripts/scrGetRoomY)