Little Orpheaus 80% Just a little over 1$ to 2.5 Euro.

$/€ 2.59 to be precise

in EUR: 2,59€

The game is available on OPQuests (1 key left) - if you have required rank on site (Bronze and as far as I remember this rank requires 1 or 2 quests to complete, and next day you'll be Bronze user), it will be 1.19$.(for EU also)
Nice game btw :)