When I see people fail to transition its because they aren’t willing to put in the work to switch industries:
1. Learn some games relevant skills after hours to show that you are prepared and not expecting us to train you from scratch (unity or unreal are most common). The tools are free for personal and there are tons of free online tutorials. Build a small game — can be very small like a breakout clone. This will show the initiative you took on your own and what skills you’ve developed.
2. Don’t expect us to pay you as much as you’re making in your past industry because your skills may not translate and we will be taking a risk on an unproven gun.
If you go into the interview with those two it’s a no-brainer for us, but we also are a small indie studio so ymmv at a larger place.