Security researcher Gynvael Coldwind applies vulnerability research methodologies to "Afra Chronicles," a massive 1994 MS-DOS role-playing game written in Turbo Pascal. Originally designed as a 15- to 30-hour open-world experience spanning over 20 dungeons and hundreds of items, the game operates on a 16-bit engine utilizing memory overlays. By treating speedrunning as an exercise in software exploitation, Coldwind demonstrates how analyzing compiler quirks and structural vulnerabilities can reduce a full playthrough to one minute and 45 seconds.

The initial phase of exploiting the game involved identifying memory safety errors. Coldwind uncovered a use-after-free vulnerability in the inventory system: because Turbo Pascal utilizes 1-indexed arrays, an empty list of zero items bypasses boundary checks entirely. This forces the logic to default to a valid state, allowing players to access freed memory and duplicate items. Additionally, analyzing the 16-bit binary revealed undocumented engine optimizations, including a diagnostic busy loop controlled by the F3 key that accelerates the application's CPU delay timers to speed up gameplay.

Rather than relying on inventory glitches, the core of the sub-two-minute route stems from a structural flaw in how the game generates save files. After repairing a Twitch streamer's corrupted profile, Coldwind reverse-engineered the save structures. They discovered that when players overwrite a save slot and exit improperly, the game reverts to an uninitialized "save0" template. This template contains leftover 16-bit quest flags and inventory items—including the game's ultimate objective, the baby prince—abandoned during the original developer's mid-game playtesting.

The final speedrun executes a precise sequence break utilizing an intentional save file corruption trick dubbed "OWGO" (Overwrite With Game 0). By corrupting a late-game save, Coldwind forces the engine to load the developer's template over a highly leveled party already carrying the required items and the "pass through stone" teleportation spell. The route exploits an uninitialized map beacon bug to warp directly to the main city. From there, they trigger the unescapable Queen battle, but immediately cast the bard spell "soothing the savage beastie" to flee the encounter. Because the spell's logic lacks a check against hardcoded escape bans, the party successfully runs away, instantly triggering the victory condition.

• Turbo Pascal's reliance on 1-indexed arrays can result in boundary check failures on empty lists, granting access to freed memory and enabling use-after-free exploits.
• Legacy applications built using 16-bit MS-DOS memory overlays often contain leftover developer debugging tools, such as keyboard-controlled CPU delay loops that manipulate runtime speed.
• When software initializes new user profiles using hardcoded templates, leftover playtesting data can expose internal state flags and unintended late-game assets.
• Intentionally corrupting a save file by interrupting the write process allows players to force the application to fall back on an uninitialized developer template.
• Application logic errors, such as failing to validate a specific bard spell against hardcoded battle escape restrictions, allow users to bypass otherwise unavoidable encounters.