Well, have you tried it? I tried that with Borderlands-2 but Steam popped up and updated me. The only other workaround is to unplug from the internet but that doesn't always work either.
I wish there was a solid, dependable way to avoid so many blasted updates and I'm sure the guys would like nothing better than to make fewer iterations of trainers for so many patches.
On average, they basically had to make an updated trainer for Sniper Elite 3 every 8 days for 4 months. Now the game is retired. That last trainer didn't last what, like 24 hours, before another patch doomed it. And us.
What about an "Auto-Updating trainer"?
We already enjoy this feature for several games
For sure it needs more works, and not all games can be tweaked
[Edited by B4Marc, 10/30/2014 1:16:57 PM]