There is no way whatsoever to get it for free. It's part of the First Strike Pack which costs around £11.49 on PlayStation Store the last time I checked, and probably the same on Xbox Live.
It was available for free as a bonus with the Black Ops limited edition for the PS3 and Xbox 360 in the USA and Amazon still has copies
You have to buy the multiplayer map pack for black ops to unlock the zombies map ascension
You cant unlock it. You have to buy it from the Xbox Live Store or PlayStation Store
In Black Ops multiplayer you unlock the AK-47 at level 38.
You purchase first strike and do not unlock ascension because it needs to be downloaded
Ascension is not unlocked you must purchase the First Strike Map Pack to Play Ascension
You unlock gold camo in black ops, when you reach prestige level 14, level 25.
You do not unlock Ascension you purchase First Strike from the PlayStation Store for $15
You get to level 50
When you rank up to level 35 you will unlock it.
You have to get to level 44 and then pay the $2000 to unlock it
you unlock more emblems
Ascension is not locked so you can not unlock it. It is not included with the zombie maps and is part of a DLC you purchase.