v1.6
Fixed that the second door will not open unless the alarm is stopped on the route A of the finale.
Fixed some bugs in the same scene as above.

v1.5
Fix minor ploblems at bottom floor in map3.
Fix minor ploblems and make small changes on escape route A in map5.

v1.4
Map 1
Change the wall near the grenade launcher to a door.

Map 2
Fixed that hidden door was accessible from the beginning.
Improved / added hint display.
Change conversation with helicopters.

Map 3
Several minor fixes.

Map 4
Add ambient light from the window.
Fine adjustment of the position of object placement.
Add secret.

Map 5
Adjust panic event of route A.
Several minor fixes and additions

v1.3
Fix map 3 navmesh.
The difficulty level can be selected at the starting point of Map 4.
Improvement of the finale.

v1.22
There were critical bugs in v1.21 on map 3.
Fix map 3 bugs.

v1.21
Fix cubemap issue.
Fix and change checkpoint issue in map3.