- The map shows three paths: green, red and yellow, but then proceeds to only send monsters down the green and yellow path for the campaign mission. A path that's not going to be used by the mission should not even be shown by the game. It just confuses pre-mission planning - I thought I'd have to defend that red path when monsters never actually used it. Only show it on the higher difficulties where it's actually going to be used. (I guess this is more of a suggestion than a bug, but...)
- The wave announcements read 'Blue Path' when it is actually the yellow path. Colors are hard.