What are your thoughts on units stepping on damaged or partially supported floor tiles with open space below?
1. Would they have a chance of falling through?
2. Depending on their weight maybe?
3. Would armor weight modifiers affect this?
4. If the floor tile was on fire, would that increase the chance of falling through?
5. What if they are flying units?
6. Does it matter if they have legs like a soldier in flying armor or if they always fly or hover like a cyberdisc?
My thoughts:
1. yes
2. definately
3. extra weight yes, negative weight depends on technology servo assist like a loader suit no, antigrav yes
4. definately
5. floor tile should have a smaller chance of collapse, unit won't fall through
6. flying units that contact the floor should have a small chance of floor tile collapse, hovering units probably not although something like a jet pack probably should have a small chance of causing collapse.
There probably should be a threshold weight below which lighter units can't cause a collapse and increasing odds for collapse the more the unit is above the threshold weight. The threshold weight would be defined per tile type and modified by amount of support it has. For example, the threshold weight for a ufo roof tile next to the hole caused by an engine explosion would be much higher than that of a damaged wooden floor tile next to a hole caused by an alien grenade.
Some random thoughts:
Consider a heavy unit crossing a frozen pond. Does it have a chance of falling through the ice?
Consider soft terrain like quicksand. Can a unit fall in and get stuck?
Edit:
There should probably be a modifier at the battle level in order to account for environmental effects such as underwater or off-world terrain.