Pro Evolution Soccer 
, Metal Gear Solid, Final Fantasy, Kingdom Hearts (Anyway Konami and Square-Enix make great games - there are a lot more of them) or a perfect Czech 
dungeon crawler - 7 mages, as a successor of Gates of Skeldal. 
Final fantasy is not underrated. But I would like to add some indie and browser games like krunker and some other one that I forgot.
Krunker and Mini-Royle 2 are some good browser FPS, also do check out club penguin rewritten
Indie games in general are underrated. Some of them put much more effort than big companies like EA.
Anarcute is way underrated and a LOT of fun
Boid, probably my favourite RTS type game.
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We do play a lot of games and due to the sheer number of games available a lot of games go under our radar, but in them a few truly shine. What would be these games?