Anything other than defeat for the Three Lions will secure their place in Euro 2012, and the goalkeeper feels the focus should be on the result and not the performance
The Three Lions travelled to Montenegro on Thursday ahead of their last game of Euro 2012 qualifying in the knowledge that they will secure their place in next summer's tournament if they avoid defeat.
"I've never played a game as key as this one is going to be for my country," Hart told the England team's official website.
"With the Under-21s it was key to get into the tournaments, the play-off matches, but this is another level isn't it?
"It's a big game and we have a lot of experienced players, we've all played big games before and we'll bring that experience.
"At the end of day it's 90 minutes of football and we're playing well as a unit, so we'll just bring that into Friday."
Hart admitted that getting the right result trumps playing attractive football, particularly in away matches.
"I think from day one it's about that," he said. "Obviously it's nice to play well, and we want to play well at Wembley and entertain the fans because they turn out in great numbers.
"But the ultimate goal is to get to the championship and we're doing the right things at the moment to do that. It's the result that matters."
Hart's backup, Scott Carson, is happy to be involved with the squad after leaving West Brom to join Turkish side Bursaspor in the summer.
The former Liverpool keeper admitted that moving abroad for the first time in his career was a massive step, but one he hopes to benefit from.
"I've played all my career in England so to go to another country was obviously a big challenge," he admitted.
"The everyday stuff you take for granted in England, you do see a lot of poverty in some parts and it makes you realise, especially having young kids myself, seeing young kids on the streets trying to get a couple quid, it's a bit of an eye-opener.
"It's a massive step, I've got a young family so it was a really tough decision. So far, it has gone okay for me, I think the hardest part of the move has now gone and we seem to have settled really well."
Carson also revealed the atmosphere around the England camp is slightly different this time around.
"When the manager first got the job, it was a bit more intense, but I think now everyone's a bit more relaxed. Everyone knows what we gotta do," Carson said.
England's game in Montenegro is their last match, while group's other four teams will each play one more time.