Following up on [[http://ufoai.org/forum/index.php/topic,7321.0.html|this report]], I was unable to find any way to build the base building building_laser, even after researching rs_laser.

This might be just a scripting problem, but I've had a look and the requirements seem correct. In my mind, here is what I think should happen:

1. Player researches Continuous Wave Laser Operation (rs_laser), opening up research on base laser turrets (rs_baselaser).

2. Player completes research of rs_baselaser, which should automatically lead to completion of rs_building_laser. The player should now be able to build a laser turret facility (building_laser) and produce a base laser turret (rs_baselaser) to install in that facility.

However, I found that upon researching rs_laser and rs_baselaser, I was unable to build a laser turret facility. I could produce a base laser turret, but I could not install it into a facility.

Somehow, rs_building_laser is not getting unlocked properly.

An alternative solution would be to do away with the laser battery altogether. The missile battery could instead be an aerial defense battery installation that can take missile and laser mounts (and any other mounts we might create in the future).

''I set the priority high on this because it is one of the very first research victories in the game, so it should work flawlessly so players can gain confidence in the game early.''