No guesses for these yet, so here's a second hint for both.
#40
-The immortal main character has no memory of his past life
-The only reason I ever wanted to own a 360
#38
-The 12th game in the series, the 7th game in the sub-series within the series, and the 2nd game in its own story arc within the sub-series
-Overall, there are 4 games part of this particular story arc, the last of which was released in the west just last month