The Geordie arrived in the summer from Celtic.
"There is something very special about the club," said Forster.
"There is a togetherness here I've never experienced before, especially when you consider the turnover of players in the summer.
"That's a credit to the lads who have settled in so fast, and a credit to the players who were already here for making us feel so welcome.
"The manager and coaching staff make us believe in ourselves and give us the courage to go out and play.
"There is no secret - we defend as a team, we have a settled back four and we make ourselves difficult to play against."
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