I was surprised at how easy it was to do, it almost felt intended but my playthrough is was fine until I got to the goblin camp. Now its broken once I try to buy or sell something.
If you want to try Act 1 solo:
1. Let Lae'zel accompany you and avoid Shadowheart in the nautiloid.
2.let her die when you are going for the transponder. her corpse will appear at the beach where you start Act 1.
3. She will not be in your party. Do no resurrect her.
4. Avoid all known locations where you have initial interactions with companions. Going to the Goblin camp will spawn shadowheart next to you no matter what.

The game will still give you the option to refuse her to join even though she insists very strongly.
It was very cool though that this was actual dialogue. Very interesting indeed.

Last edited by gameboy.cardo; 23/10/21 10:44 PM.