Kamek is a game, which is maybe a bit too new to be a classic, but I chose it anyway, because I think it deserves the extra bit of attention. It's made by CoolZx, who's best known for his series of "Infestation" games and add-ons. It's been released under both the Infinity Incorporated and Reptile House banner.
The game is a classic example of a "temple" game. What I mean with that, is that this is a game in which you have the explore a temple filled with tons of traps and dangers. The game lacks a real introduction or something: You just start in the temple and start exploring!
I mainly like this game for its great gameplay. I've always loved games filled with traps like this one. The puzzles are a bit difficult, but that's always better than too easy. Added are some above-decent graphics too. This all makes this a game a classic, I think.