Consider the following premises. There is at least one x_8 for which x_8 is sad or x_8 will not climb a mountain. For all x_8, if x_8 were sad, then x_8 is playing a game. For all x_8, if x_8 plays a game, then x_8 is climbing a mountain. Can we infer the following from them? For all x_8, the fact that x_8 were sad does not imply that x_8 is climbing a mountain.
That contradicts the premises. Therefore the answer is no.