Appiah enjoyed a fantastic 2014/15 as a decent goal haul on loan at Cambridge United saw him unexpectedly called up to the Ghana squad for the 2015 Africa Cup of Nations, where he made his international debut and scored in the finals but suffered the agony of losing the final on penalties.
The striker broke into the Palace first team during the 2011/12 season and has gone on to featured sporadically for the Eagles since then, while also picking up plenty of experience with various loan moves.
He played in four Championship games in 2012, making his debut as a late substitute in the 1-1 draw at Coventry City that April, and came on as a sub in the Eagles' first three games of the 2012/13 campaign.
After playing for various clubs in non-league, Appiah made his breakthrough with Margate where he scored 35 goals in 33 appearances to catch the eye of Palace.
He continued to gain first-team experience at the start of the 2013/14 season where he banged in 10 goals in 17 goals for Cambridge United in the Skrill Premier, and later had shorter stints with Notts County and AFC Wimbledon away from Selhurst Park.
That was the same theme going into the next season as he re-joined Cambridge on loan until January and continued to find the net for the U's in League Two during the next two seasons, before finishing 2014/15 on loan at Reading where he scored once in six games.