Gentlemen, please come this way.

Good evening ladies and gentlemen,
Good evening my deer friends,

I'd like to invite you to my first little puzzle in my SG history.
As I recently got my master title, I want to share something with this nice community.

In the pot are three fine games and a DLC from the Humble Jumbo Bundle 9 (all level 1, gift links, Game title hints: M, IP, IP:TA & C)

You are searching only for the first letter of the answer. (all capital letter)
M: lWxg? // ? = 3.14159265359
IP: IAjH? // ? = legendary sword of King Arthur
IP:TA: O?ewj // ? = first car made by KTM
C: 74uz? // Italian explorer to be considered the "discoverer of America"

I wish you good luck!

Best Regards,
Master Myr the 13th.

PS: if you are really bored, what I guess you are not ... check out my 'art collection'