Culdcept

Unlock E Cards:
Find the following set of cards:

Bistair card: Find all Fire creatures
Iksear card: Find all Water creatures
Selenear card: Find all Earth creatures
Terrair card: Find all Wind creatures
Soltis card: Find all N, S, R cards, and Rainbow Piece, Sanctum Guard
Erasure, Lance of Odin

Unlock Bonus maps and E Cards:
Find the indicated amount of medals:

Number of medals - Bonuses:
5: 5 bonus maps between 21 and 30
10: Leoknight Card
15: Polymorph Card
20: 5 other bonus maps between 21 and 30
25: Astral Queen Card
25: Dragon Helm Card
30: Lightcraft Card
35: 5 bonus maps between 31 and 40
40: Energy Flash Card
40: Tetramorph Card
45: Darkcraft Card
45: Talisman Card
50: 5 other bonus maps between 31 and 40

Unlock Zeneth as your opponent:
Win 1st place in the tournament at Cratos.

Unlock Najaran as your opponent:
Fight 3 battles with Zeneth.