Deus Ex Human Revolution
Third game, it was developed by another team, but they tried to make game closer to first Deus Ex. I haven't played it much at first, because all time was spend for modding and fixing bugs in the game, but later completed it and was totally satisfied. Game have many similar things to Deus Ex 1 and gives sweet deja vu feeling from time to time, but visual quality and performance are awful. 3d models mostly very bad, they are not stylish (also environment is empty if compare to modern games, some textures are missing). Some of them looks very good, like from other game imported by modders. This make me think game was developed for too long or by very different people who made game content not equal between levels by way it's done and quality.
Gamers are not objective as most of humans. Like chickens percept first creature as their mum, they decided that game should be yellow as on first screenshots. I hate all modern color filters, because they can be applied only for some rare cases, but not always the same. It's not just the matter of taste, when human eye see darkened image with degraded colors, "quality looks better" as less errors visible actually. Replace heads of characters in game with some zombie and they will look much more real, just because you never saw zombie. Well, color filter removed by me, added few effects and raytraced reflections (the only version which use it). Tried to implement self shadowing, but amount of problems with game lights completely destroy positive changes (game lights are applied through the walls).

You may see comparison screenshots from this mod and vanilla game in the gallery.
I tried to do raytracing in one of versions, but didn't release it. Screenshots of it are available in the gallery.

v0.450 Director's Cut version
v0.276 for Director's Cut version and partially for non DC version of the game
v0.088 FX IMPLANT 2.0, outdated version for some older patches of the game