Here is the full list of all 20 Klondike Solitaire Collection achievements.
Win a game of "Agnes Sorel"
Win a game of "New York"
Win a game of "Giant"
Win a game of "Batsford"
Win a game of "Easthaven"
Win a game of "Blind Alleys"
Win a game of "Can Can"
Win a game of "Eight by Eight"
Win a game of "Westcliff"
Win a game of "King Albert"
Win a game of "Klondike"
Win a game of "Klondike by Threes"
Win a game of "Klondike by Threes (Easy)"
Win a game of "Klondike Territory"
Win a game of "Pas Seul"
Win a game of "Steps"
Win a game of "Thumb and Pouch"
Win a game of "Lana"
Win a game of "Klondike (Easy)"
Win a game of "Agnes Bernauer"