Wesker, a true mastermind is an article in Resident Evil Recollections. It was uploaded on 29 June 2015.
Wait, Wesker was in Resident Evil 4? Well kind of, although he was working behind the scenes as usual, as we can infer from what Ada and Krauser say.
All three of them working together seems nigh impossible given their own ambition, but Wesker manages it somehow.
There aren't many who can pull off the puppet master role quite like Wesker, although Ada is a close second, especially in the way she reveals to Krauser how she and Wesker were both using him for their own ends.
He also appears in the Mercenaries as a playable character, and features a powerful loadout along with some great moves. Needless to say he's a fan favorite, can't get enough of that punch!