You have been hit by a force that may cause you to fall over.
Knockdown is a tagged effect. Sources apply it as Knockdown X, where X is the potency. The resist ๐ DC is increased by +2 for each point of X beyond the first, so Knockdown 1 carries no increase and Knockdown 3 is +4 DC.
You are immune to this effect if you are already Prone.
Roll an ๐ END + ๐ Survival Test
Guaranteed Minimum
By default, a successful resist completely negates Knockdown. Some weapons or abilities may specify a guaranteed minimum in their description (e.g. โKnockdown โ even on a successful resist, you suffer -1 AP next turnโ). When present, that minimum overrides the standard โno effect on successโ outcome. The Knockdown effect itself does not impose a minimum.