Larian Studios Forums Baldur's Gate III Baldur's Gate III - Suggestions & Feedback How limited is the engine? Is that why so much can't be done?

It was extremely obvious from the beginning that the game's using a modified DOS2 engine, which handles everything well except for defensive calculations triggered outside of your turn. The only things in DOS2 similar to reactions are the automatic opportunity attacks and the Reactive Shot ability that archers have, and reactive shot automatically launches up to 3 basic attacks if an enemy walks into the AoE while it's active. And true reactions are a great deal more complicated than those.

Quickened metamagic though? Not sure why that wouldn't be in. I'd chalk that up to a conscious balancing decision instead, or something broke when trying to convert main action spells into bonus actions, since I don't think a similar interaction exists elsewhere in the game yet.