YoctoYotta's Top 16 - #2: Half Life (series)

Valve decided that cut-scenes are stupid. While I'd can't say I agree completely, I definitely can't argue against their masterful use of the first-person perspective and silent protagonist to weave one of the most immersive stories told in the video game medium. Add the ahead-of-its-time physics-based puzzles and spot-on shooting mechanics, and you got a game everyone should play, even if they don't like killing things. Orange Box, by the way, is hands down the best deal to ever grace the industry.