Seeing how the orcs love to kill them selfs to kill others the question is about Sacraficeing example:

The player has the Quest Smash 'Em All!: Action: Sacrifice the unit on this quest to destroy all enemy support cards. Use this ability only if Samash' Em All! has 3 or more resource tokens on it.

and he sacrafice's the Lobber Crew, which also has a sacrifce Action: Sacrifice this unit to force an opponent to sacrifice a unit he controls, if able.

My question is does both Actions go off when they are Sacrificed or does the first one over ride the other?

No, you can't. Sacrifice in this case is a cost, and you cannot pay 2 costs with the same ressources.

It's like paying 2 ressources tokens for a unit AND pay with the same 2 tokens to play another unit.

Hypothetically, if you played the action on Smash Em All then your opponent played an action in response that destroyed the support card(s) you were really interested in destroying then you could play the action on Lobber Crew in response to that. If you did that then you'd get the effects of the action on Lobber Crew and not the action on Smash Em All.

ChaosChild: actually no, that doesn't work for 2 reasons:

1) The sacrifice for Lobber Crew and Smash 'Em All is part of the cost ("Sacrifice the unit on this quest to..." and "Sacrifice this unit to...") and hence you pay that sacrifice when you declare the ability, not when it resolves. So regardless of what your opponent does in response, you couldn't choose to do the other one since your unit is already sacrificed.

2) Lobber Crew's ability only works when they are in the Kingdom, so you're never going to choose between them anyway - if the Lobber Crew is on the quest, they can't use their ability.

There are no separate costs and effects in this game. The unit is only sacrificed when the effect requiring it to be sacrificed resolves.

You are incorrect. There are separate costs and effects. The magic word on the card indicating a cost is "to", e.g. "Sacrifice a unit to...". If it's not part of the cost, it's worded like this: "Sacrifice a unit. If you do, ...".

If you were correct, you could counter a Lobber Crew's effect by responding with an effect like We Need Your Blood to destroy it, and I'm 100% sure that does not work.

Clamatius is absolutely correct.