
For me I have 2. Rebel Raiders: Operation Nighthawk on PS2 and Tenchu Z for 360.
Rebel Raiders was a port, that with an updated graphics and gameplay system. It didn't take long for me to love a great style flight simulator/military aircraft game, Took some practice however.
Tenchu Z for those 360 ppl who are not aware, borrows its engine (in my opinon) from Way Of The Samurai series, but modified. Play a ninja, customize him or her, and go on missions, the control system is a bit tricky to use, but I'm learning slowly, 3 difficulty levels to play on for each mission, I love it.
Those are my lesser known picks, How about yours?