No missable achievements (plus 64 unknown)
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Opened the entrance to La-Mulana.
Received damnation.
Dived into a pot.
Took a knee.
Completed the adventure.
Completed the entire adventure within 40 hours.
Unlocked the HELL TEMPLE.
Completed the entire adventure within 20 hours.
Got all emails.
Completed the entire adventure within 10 hours.
Obliterated all guardians without using secondary weapons.
Obliterated all guardians without using secondary weapons in HARD MODE.
Listened to everything Xelpud has to say.
Scanned all suspicious spots.
Listened to everything Mulbruk has to say.