From Alpha Strike: Commander's Edition, Determining Critical Hits Table and Motive Systems Damage (pp. 49โ51). Effects are summarized.
Motive Systems Damage
Roll 2D6 every time a vehicle is damaged (armor or structure), adding its motive modifier.
| Mod | Motive type |
| +0 | Tracked, Naval |
| +1 | Wheeled, Hovercraft |
| +2 | VTOL, WiGE |
| 2D6 | Motive effect |
| 2โ8 | No effect |
| 9โ10 | โ2" Move, โ1 TMM |
| 11 | โ50% Move and TMM (round down; at least โ2" and โ1 TMM) |
| 12+ | Immobilized |
Reduced to 0" Move = immobilized. An airborne VTOL/WiGE at 0" crashes (1 damage, roll crits normally); a submerged unit at 0" sinks (same).
Vehicle critical hits
| 2D6 | Vehicle |
| 2 | Ammo Hit |
| 3 | Crew Stunned |
| 4 | Fire Control Hit |
| 5 | Fire Control Hit |
| 6 | No Critical Hit |
| 7 | No Critical Hit |
| 8 | No Critical Hit |
| 9 | Weapon Hit |
| 10 | Weapon Hit |
| 11 | Crew Killed |
| 12 | Engine Hit |
A result that can't apply (e.g. a Weapon Hit on a unit whose damage is already all 0) does 1 extra damage instead, with no further crit roll. Crit effects last for the rest of the scenario.
When to roll (2D6)
- An attack damages structure.
- The attack roll was a natural 12.
- A successful Death from Above or Anti-'Mech Infantry attack (one roll even with no structure damage; another if it did damage structure).
- BAR units: any damage, even with armor left. Submerged units: any damage.
Effects
- Ammo Hit
- Destroyed, unless it has CASE (takes 1 more damage; roll again if that hits structure) or CASEII/ENE (no effect).
- Crew Stunned
- Can't move or attack next turn; treated as an immobile target.
- Fire Control Hit
- +2 to-hit on all its later weapon attacks, cumulative. Physical attacks are not affected.
- Weapon Hit
- All damage values, including special-ability damage (AC, LRM, SRM, HT, IFโฆ), โ1 (minimum 0). Physical attacks are not affected.
- Engine Hit
- Move, TMM and all damage values halved (round down). A second Engine Hit destroys it.
- Crew Killed
- Treated as destroyed: remove the unit from play.