The Builder's Blueprints were contributed to the Steam Workshop.
Main article: Paint Can
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- The Builder's Blueprints were added to the game.
- [Undocumented] Added Strange quality.
- The blueprints show mechanical diagrams for a Level 1 Sentry Gun. The textures used for the blueprints were originally direct copies of the in-game blueprints, but were later changed to custom team-colored blueprints.
- The item's description is a play on the saying "bring a knife to a gunfight", meaning to enter a challenging situation or confrontation without being adequately equipped or prepared.
The Engineer wearing the Builder's Blueprints on the main menu.