To approximate the probability of the die coming up with a specific outcome (in this case, a 1) using the empirical method, we can use the following formula:
\[ P(\text{outcome}) \approx \frac{\text{Number of times outcome occurs}}{\text{Total number of trials}} \]
Given that the die was rolled 850 times and it came up with a 1 a total of 85 times, we can plug these numbers into the formula:
\[ P(1) \approx \frac{85}{850} \]
Now we calculate the fraction:
\[ P(1) \approx \frac{85}{850} = 0.1 \]
To round this to four decimal places, we keep it as:
\[ P(1) \approx 0.1000 \]
Thus, the approximate probability that the die comes up 1 is:
\[ \boxed{0.1000} \]