Limit points of one-parameter subgroups for additive actions on hypersurfaces

By an additive action on an algebraic variety $X$ over $\mathbb{C}$, we mean an action of the group $\mathbb{G}_a^n = \mathbb{C}^n$ on $X$ with an open orbit. We study limit points of one-dimensional subgroups of $\mathbb{G}_a^n$ for additive actions on projective hypersurfaces. We say that an additive action on $X$ satisfies the OP-condition if for every point $x\in X$ that does not lie in the open orbit $O$ there is a point $y \in O$ and a vector $v \in \mathbb{G}_a^n$ such that $\lim_{t\to\infty} tv\circ y = x$. We find all projective hypersurfaces on which there is an additive action satisfying the OP-condition.