Had my first two games of kill team today and incredibly won both! Was at a games pub night, my opponent and me were both newcomers to kill team but there were others there to help us.
I went Primaris, he went Tyranids. The first mission was basically me hanging back and shooting, combat was mainly defensive and my pistols did a lot of time work, plus the dice god's here definitely on my side. His Tyranid warriors were terrifying but the termigants were so useless they basically could be ignored. Genestealers were decent but squishy, they did the most damage.
Second game we were more comfortable with the rules but he ignored the objectives and zerg rushed me. I got lucky in my first turn of shooting and took out his synapse, them my hero combat specialist reiver sarge with a combat knife (5 attacks!) Dominated the centre field by charging two genestealers then surviving a charge by a third. He killed one, wounded one then fell back to let the others get bolted to death.
The absolute legend however was one of my random intersessors who my opponent planned to outflank and shoot to death with his termigants. The Primaris marine in question threw a frag grenade over his shoulder without looking rolling a 6 for shots, which I split to one each bug, hit 5 times and wounded 4. They then failed all their armour and I fatally wounded 4 times. I killed 4 Tyranids with 1 frag grenade! I felt pretty bad about that I mean what are the odds. My opponent conceded and I went home pretty chuffed.