I was heavily disappointed at the lack of rewards for collecting achievements in Portal. Although the achievements were undoubtly fun to collect, I think what really would've really put some icing on the cake (no pun intended) would be if they had some awesome rewards. For example.
3 achievements: Access to the concept art library
6 achievements: Bonus level? (Either a bonus puzzle level, or some kind of factory where they build the turrets)
8 achievements: Bonus feature: Chell
10 achievements: Bonus feature: GLaDOS
All achievements: Access to song, 'Still Alive' (some of you may disagree with this, I understand, so feel free to give your own opinions.)
OR
Special level where you play as an Aperture Science employee. At the end of the level, you are killed by the neurotoxin.
Discuss.
3 achievements: Access to the concept art library
6 achievements: Bonus level? (Either a bonus puzzle level, or some kind of factory where they build the turrets)
8 achievements: Bonus feature: Chell
10 achievements: Bonus feature: GLaDOS
All achievements: Access to song, 'Still Alive' (some of you may disagree with this, I understand, so feel free to give your own opinions.)
OR
Special level where you play as an Aperture Science employee. At the end of the level, you are killed by the neurotoxin.
Discuss.