Mass Effect Wiki. 3,759 Pages. Mass Effect Guide; Mass Effect 2 Guide; Trelyn is the third planet orbiting the star Strenuus. Main article: Trelyn Xawin.Xbox 360 Cheats - Mass Effect: This page contains a list of cheats, codes, Easter eggs, tips, and other secrets for Mass Effect for Xbox 360. If you've.Mass Effect - Planet Investigation: Xawin Platform: PC/XBOX 360/PS3 Release: November 2007 Rating:.For Mass Effect on the Xbox 360, a GameFAQs Answers question titled "How do I leave Xawin after the Privateer Mission?".For Mass Effect on the Xbox 360, a GameFAQs message board topic titled "Can't land on Xawin?".