Syberia is an amazing adventure, I'm not a fan of this genre, but liked it a lot. Puzzles are very logical and simple in a good way. Storytelling and characters are great, it was especially nice to see how main character changes through out the game. Backgrounds look decent even today (character models - not so much).
Serious Sam: the Second Encounter is exactly what you might expect from a good sequel: same game but bigger and better.
Serious Sam alone revived the adrenaline fast-paced shooters. It inherited fast paced action and high difficulty from Doom while also having it's own unique style.
Soma got interesting and thought provoking plot, great atmosphere and visuals. Gameplay itself is little bit stale especially stealth parts, but I enjoyed Soma a lot although horror is not my favorite genre.
Pretty much same old Heroes 3 in 3D, with few improvements to the classic gameplay: better leveling system for heroes, alternative upgrades for units, finally nerfed Necropolis)
