Boarding the Hulk
Genestealers are described in the Space Hulk rules.
Genestealers have an initiative of 10.
A Genestealer has a 66.0% chance of defeating a Terminator with Power Fist in close combat.
A Terminator with a Power Fist has a 17.4% chance of defeating a Genestealer in close combat.
A Terminator with a Storm Bolter has a 30.6% chance of killing a Genestealer on the first shot.
A Terminator with a Storm Bolter and sustaining fire with 3 shots has a 86.3% chance of killing a Genestealer.