TI-84+ SE OS 2.41 with Portal: Prelude installed and a complete 38-level save.

Steps to begin:

1. Download [>Wabbitemu<](http://wabbitemu.org/) or suitable emulator.
2. If you wish to install the game yourself onto your own Graphing Calculator setup, check the [>README<](https://www.ticalc.org/cgi-bin/zipview?83plus/flash/games/portalprelude.zip;PortalPrelude/README.txt) file on the game's [>download page<](https://www.ticalc.org/archives/files/fileinfo/451/45101.html). Otherwise, continue to step 3.
3. Download the attached file below.
4. Load ROM in emulator (Wabbitemu should autoprompt, else File > Open > select ROM). Maximize window for full calculator and/or open Detached LCD screen via View menu.
5. Open from the APPS menu (purple text key) on calculator.
6. Refer to official README in step 2, as well as the [>controls guide<](https://www.speedrun.com/portal_prelude_ti_84/guides/k7z2g), to learn to play.

Portal Prelude Full ROM

DewOnTheGrass

Portal: Prelude TI-84

Graphing Calculator

PulMatrox

Portal

A new challenger has appeared…

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Speedrun

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