What's it going to be on XBLA this week, an alien onslaught or a puzzle apocalypse? The choice is yours, whether it be Tecmo's Puzzlegeddon or Team17's Alien Breed Evolution. Either game will set you back 800 Microsoft Space Bucks (ten earth dollars), so it boils down to preference. Frankly, we've always been fans of mowing down waves of alien scum, but destroying your friends via brightly colored blocks has its charms too. Check out the latest XBLA in Brief and see which one speaks to you.