Research and Development (Half-Life 2: Episode Two)

Research and Development
Screenshot showing a vehicle the player must build to complete the game
DeveloperMatt Bortolino
EngineSource
PlatformWindows
ReleaseJuly 17, 2009
GenrePuzzle

Research and Development is a free mod for the first-person shooter video game Half-Life 2: Episode Two. Developed by Matt Bortolino and released on July 17, 2009, it is a non-violent first-person puzzle video game, and has been compared to Portal. It received critical praise for its unique gameplay and high development quality.