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Proto:Team Fortress 2

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This page details one or more prototype versions of Team Fortress 2.


The earliest prototype of this game back when it was about Humans vs. Aliens.
June 25th, 2007
On June 11th, 2020, an archive of Postal III's Perforce was leaked. Contained within is both the source code and a beta build of Postal III, unfinished beta builds of Team Fortress 2 and Half-Life 2: Episode Two, and various Source Engine development tools. The TF2 build contained within is dated 3 months before the initial closed beta in 2007, with the binaries for the build specifically dating to June 25th, 2007. It is the earliest known prototype of what would become modern TF2. This build is unplayable due to broken .dlls, however it contains debug .pdbs leftover from compilation, revealing what was in the build engine-wise during this time period.
2009 Closed Beta
The closed beta that was privately playtested by top-level competitive players in 2009.
2010 Open Beta
The open beta that was launched in 2010, and was eventually cancelled and removed from Steam in 2013.