[Drunken F00l]

In source engine, there are several different move types (listed below). Only one of them is VPHYSICS (which you have come to know as physics-based). I haven't checked, but I'd be pretty sure rockets are MOVETYPE_FLY.

Code:

enum MoveType_t
{
    MOVETYPE_NONE        = 0,    // never moves
    MOVETYPE_ISOMETRIC,            // For players -- in TF2 commander view, etc.
    MOVETYPE_WALK,                // Player only - moving on the ground
    MOVETYPE_STEP,                // gravity, special edge handling -- monsters use this
    MOVETYPE_FLY,                // No gravity, but still collides with stuff
    MOVETYPE_FLYGRAVITY,        // flies through the air + is affected by gravity
    MOVETYPE_VPHYSICS,            // uses VPHYSICS for simulation
    MOVETYPE_PUSH,                // no clip to world, push and crush
    MOVETYPE_NOCLIP,            // No gravity, no collisions, still do velocity/avelocity
    MOVETYPE_LADDER,            // Used by players only when going onto a ladder
    MOVETYPE_OBSERVER,            // Observer movement, depends on player's observer mode
    MOVETYPE_CUSTOM,            // Allows the entity to describe its own physics

    // should always be defined as the last item in the list
    MOVETYPE_LAST        = MOVETYPE_CUSTOM,

    MOVETYPE_MAX_BITS    = 4
};