Omega Deathmachine notes

Item 1 clue: "Riddle me this, (playername): who's truly the master of riddles - - he who propounds them or he/she who solves them? An interesting question... But if I can well and truly bamboozle you with my latest game, then my title goes undisputed! For this little set, I've hijacked an archaic website belonging to some piddling little video game company which hasn't seen fit to update their content since the early 21st century: http://www.legacyofathousandsuns.com/hunt/. But will you find all my hidden pages? Oh, I can't resist giving you a head start! 'Quix dux ad portas?'

Item 2 clue: 'Ydtw wvpzox mmu esa'gl s zfdsriufd clu svwze'u mdky mxuyz iow yvtd ry nta merpeq. Dyz nrg'n ia ziyi azhk urhhlk xe wkpfn ypg pnwt uuy'bt ywtnlhkyp whsai azl losyxlea gvujuv ffv? Vhm'm epgvz lplo ro odls ajk xu vll ayf ldef dkrpocn... Oof celen fdk jgkvjpkf drr ir Ogpghajv'j tyq? Bh rqrp, ou fgb upx'w fczz!'

Item 5 clue: 'This is not a clue. Or is it?' Scan the QR code.
http://legacyofathousandsuns.com/hunt/ukodus
What do you need in a robot war?  (Anita/Wilex?)
The initial of a goliath (TALOS/something to do with Colossa)
Sounds like one of those short jokes… “How many allies do you need to face a Legion?” (Forum suggests FoN)
What’s the latest edition of NIDQP? (???)
Famous myth… famous ship… (Odyssey)
A heartstealer’s defense (Forums say Lupin)
Galaxy’s greatest pilot (Ace Pilot set?)
One of the most common weapons in human space (AK-47000)
Notes from the day Galaxydome opened its gates (???)

Sudoku solution http://imgur.com/l2TL5
Credits to Ravage_mk2 923-576-481
    "To move on, try using this sequence x23xxxxxx"

Reformatted,
Notes from the day Galaxydome opened its gates/The initial of a goliath/Sounds like one of those short jokes… “How many allies do you need to face a Legion?”/Famous myth… famous ship…/Galaxy’s greatest pilot/A heartstealer’s defense/What’s the latest edition of NIDQP?/One of the most common weapons in human space/What do you need in a robot war?
http://www.legacyofathousandsuns.com/hunt/anita
http://www.legacyofathousandsuns.com/hunt/hannibal