Remo, Chris (June 18, 2010). "Portal 2's Wolpaw: 'I Don't Want to Resurrect A three-Year-Old Meme'". Leahy, Brian (March 8, 2010). "Valve Hires DigiPen Team; Seemingly for Portal 2". Shacknews. O'Connor, Alice; Leahy, Brian (March 1, 2010).
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