The Apple Developer Connection has published an extensive report on game developer Aspyr's work ensuring the company's games will work on Intel Macs.
The report: "Aspyr's Universal Binaries Experience: Bringing Games to Intel-based Macs". It contains insight from Aspyr director of development Glenda Adams.
Adams said: "We have to be able to ship games in 2006 and beyond as universal binaries. We need to update some older games to run natively on Intel, so switching to Xcode, making the effort to build universal binaries, and then testing on both platforms is vital."
Aspyr currently has Doom 3, The Sims 2, Star Wars Knights of the Old Republic, and Jedi Academy ready as Universal Binaries.
The company may leave some older titles to languish as non-optimised for OS X Intel, relying instead on the built-in Rosetta translation engine.