Research and Development is a puzzle-centric mod for Half-Life 2: Episode Two featuring an unarmed player but plenty of violent mayhem.
"It's as must-play as an HL2 mod gets" - Research and Development has received a glowing review from Rock, Paper, Shotgun!
rps digs r&d
Matt Bortolino's excellent HL2: Episode Two "action puzzler" has been released from nowhere!
research and development released
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