Now on the 40K vs Star wars 40K wins, but I am not so utterly sure that they get an easy victory over stuff from Mass Effect. The description of the most commonly ship to ship used weapon on any ME ship seems a lot like a Nova Cannon to me. X) And reapers seem to take those shots and giggle. Would be a SWEET fight tho. In the end, Space Marines win, I just think it would be far harder for them than stomping on storm troopers. lol
Even the 40.000 milenia, the reapers are dangerous threat... The cycle always continue, and reapers return ! Blood Ravens, most faithful and honorable servants of the emperror, will stop the ancient enemy ?