the result is:

0

-2

-3

-4

-5

-6

...

at each tick it adds -1 to the z-velocity, G = 1 is the acceleration based on tick (1/35) and unit, to translate it to meters and seconds, some substitutions have to be done:

G*(m/s*s) = 1

1meter = 32units, 1second = 35ticks

G*(32/35*35) = 1

G = 35*35/32 = 1225/32 = 38.28125 (in meters/second^2)

so the doom Gravity=1.0 is more than Earth gravity in x3.9 times.

35 units per second, and the second is 35 ticks, so it's 1 unit per tick.After 1 second of falling from a standstill, a typical gravity 1.0 actor will be falling at a speed of 35 units per tic.

This translates to 35x35 units per second - 1225.

yes, 38.28125/9.8 = 3.90625 a bit more precisely.Is Doom's gravitation acceleration really up to four times what we see in real life!?

those are my calculations, maybe wrong somewhere, but i've made some projectile fall tests from 10 meters (320units) and it looks and feels quite natural with the g=9.8