Research and Development (mod)
| Research and Development | |
|---|---|
| A screenshot showing a vehicle the player must build to complete the game | |
| Developer(s) | Matt Bortolino | 
| Engine | Source | 
| Platform(s) | Windows | 
| Release | July 17, 2009 | 
| Genre(s) | Puzzle | 
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.