Ryse: Son of Rome

Unlike the other solution for this achievement there is an easy way to get this in one playthrough no matter what difficulty you play on.

The key to getting this achievement is keeping a high multiplier while in combat while using the "Bonus XP" perk (right on D-Pad). Each hit will add x1 to your multiplier increasing the amount of Valor you get when the combo is either broken or you've defeated all enemies in an area and the multiplier expires. An easy way to get your multiplier up is during executions. A Legendary hit will add x3 to the multiplier, a Centurion hit will add x2 whereas a Soldier hit will add x1 like a normal hit would.

Having your multiplier broken by an enemy will drastically reduce the amount of Valor you earn from that multiplier, whereas if you kill all the enemies within an area and the multiplier expires you will earn much more Valor. In the open square area while protecting your father Leontius in the "S.P.Q.R" mission I achieved over a x150 multiplier and earned around 75k Valor for that one multiplier itself.

This achievement is a lot easier as well if you have good combat awareness too, when an enemy is approaching you mid-combat always press A to keep them from breaking the multiplier and attack them and switch back and forth between targets when multiple are attacking you.

This achievement is fairly easy if you're good at maintaining multipliers. The rough cost of all the upgrades and executions combined is around 2 million Valor and all the upgrades and executions are unlocked by level 7 which is unlocked after earning 600k Valor.

Hope this solution has helped. If you leave a negative vote please leave some constructive criticism in the comments section so I can work on improving it.

I used TwistahXD his solution but would like to add things to speed it up :)

When you get to the point where you have to protect your father (and get tons of valor points like he sed).afther you killed everyone and got your valor points.
Just restart cheqpoint the game tells you : you will lose everything that's not saved BUT you keep you valor points.
So i just protect my father 4times and was able to get over 600k valor points in like 10 minutes.
so instead of runing trough one or 2 missions to get your last points you can do this :) NOTE : when you bought all your upgrades and stuff you have to kill a few enemies for the cheevo to pop up...(at least for me it did )

Grtz Magnificent X
(sorry for bad englisch )

With in-game gold now being free in the Microsoft store just head over there and get yourself plenty of gold to buy all the upgrades with.

To buy all of the upgrades you will need to have title 7 - Salararius which is fairly easy to obtain by the third chapter especially if you have the xp boost executions on

Once you have done this just load up a match and you should get the achievement.

A new way to add to the previous guides

Again SPQR mission, and by all mean do the combos on the first section you'll net around a 30-40x on the first room, then 60x on the next room this is a big room with lots of enemies...BUT, later on after you climb the building..

get to the colosseum where there are pila archers on the roofs, kill them, jump down

now you should have max focus by this point if you break the pots along the way

So, use the focus, kill the first three, then focus, next three and focus next three

this normally gets around 60x and with untouchable bonus, focus bonus +xp
-- I got about 50'000xp from this checkpoint