Erik Wolpaw

Portal, Half-Life 2 co-writer Erik Wolpaw has left Valve

Minecraft, Day Z represent the "promise" of games, say Schafer, Wolpaw

Portal 2's lost plot elements include turret marriage

Portal 2's plot partially inspired by panic

Valve writer talks about why Chell doesn't speak in Portal or Portal 2

Portal 2 releases - Unreview, uninterview, unstudiovisit

Wolpaw: Players don't care about Portal's Chell

Portal 2 won't require "twitchy ninja skills" to solve

J.K. Simmons lends voice to Portal 2's Aperture Science president and founder Cave Johnson

Valve plans to let us in on more of the Portal 2 story soon, says Wolpaw

Portal 2 could have skipped out on portals, says Valve

"Chaos" canned Portal 2 competitive multiplayer

Valve: No cake meme jokes in Portal 2