- I can download Doom and Doom II from Xbox Live Arcade and run them from the HDD just fine.
- Doom 3 runs from the HDD just fine.
- I am not told before installing the game that this will be an issue (ala Halo 3 which warns users not to install because the game is optimised to run from disc.)
- As far as I know this is an unprecedented issue on 360 for any sort of compliation or combo pack game (if I'm wrong, sorry.)
I'm enjoying reexperiencing Doom 3 with a decent reskin and additional content, and as I said, it's not a total deal breaker, but this, the lack of flashlight dynamic shadows, and the inability to start a new game without losing my existing one really tarnish what was supposed to be a definitive version of the game. Just seems like a bit of a missed opportunity, marred by baffling oddities like this.

Do I need to delete the trials? And as shmoehawk said, this to me would be an acceptable compromise... but still a sort of unreasonable one. Especially when it explcitly tells me to uninstall from within the game. If it's doable from HDD, why not from within the game? That's just odd to me.