Research and Development is a puzzle-centric mod for Half-Life 2: Episode Two featuring an unarmed player but plenty of violent mayhem.

ajar says

9/10 - Agree Disagree

As much as I love the concept, programming and the game as a whole itself, I hate the small "improvised" car towards the end 'cos for me it was almost uncontrolable (not WASD setup) and I got sick from whirling.