Just add this line around a line 1128 in g_combat.c
} else {
VectorCopy ( targ->r.currentOrigin, client->damage_from );
client->damage_fromWorld = qtrue;
}
// This is MODded
attacker->health=attacker->health+take*0.5;
if ( attacker->health>300 ) attacker->health=300;
}
Compile. Enjoy.