Core:
+ build_config_defines.h - take some control over ever growing number of changes

Script callbacks (examples in bind_stalker.script)
+ key_press
+ key_release (disabled in build_config_defines.h)
+ key_hold (disabled in build_config_defines.h)
+ mouse_move (disabled in build_config_defines.h)
+ move_wheel
+ item_to_ruck
+ item_to_belt
+ item_to_slot

Misc:
+ first person death (configurable in build_config_defines.h)