Talk:Split Chamber/@comment-24.7.15.231-20130818162555/@comment-192.183.66.13-20130822141809

It's NOT A BUG.

Olympus's first two sets (waves 5 and 10) were nerfed from Tier 3 to Tier 2 in the last update. Notice the loot you get offered as rewards; it's all from Tier 2 Corpus Defense intead of Tier 3.

From Wave 15 onward, it's all tier 3. (just like every other defense mission)