Mortal Kombat 1 for sure, it was such an awesome film, worked really well and felt really faithful.
Silent Hill 1 - A lot of love went into that film, a lot of cool references and it almost felt canon, its influence was felt in later installments toow hich was nice. While it may not have been Harry, it did have the spirit of the games despite the changes they made for dramatic necessity. (although they did always itend on casting a male lead they felt that Rahda 'Rose' was perfect for the part during the casting stage)
Tekken Blood Vengeance - made by capcom themselves (i think all video game movies should be made by the developers themselves) this film may have been a generic fan fiction in disguise (worse than SS) but it did have Tekken's organic humour and it still felt very authentic because of course it'd star Ling and be a highschool drama with a fight that had nothing to do with anyhting, as most tekken games do.
Resident Evil Degeneration and Damnation - basically these things are like watching somenoe else pla a video game. they look superb, seem to be canon and are a lot of fun, the way they play out are all very much like the games since theyre so close to being movies anyway so... yeah they work really well