dman
Moderator
Status: Fixed in 0.1.8.7
Reported: Oct 19, 2026
Fixed: Oct 19, 2026 in 0.1.8.7
Seen in version: 0.1.8.6 and earlier
What happened: Research XP followed each enemy health, which grows every wave, so one longer game could earn enough XP to unlock almost every tower, including the Airport.
What was expected: Research should take a number of games, so there is always something to work towards.
What was fixed: Every kind of enemy now pays a set amount of XP, with a small bonus for later waves and a big reward for bosses. A 15-wave game pays about 5,800 XP: the Sniper and Helicopter come in the first game, the Cluster Mortar around game 3, and the Airport around game 12 if you save for it. The +XP numbers on kills now match what your account receives.