Halo, everyone of them. Legendary difficulty, if you dont use the environment as cover. Your dead, in seconds. Still one of the best series to date, and with many long time fans.
Any other fps game (whether it be shields or not) with decent difficulty, if you dont use the environment as cover. Your dead, in seconds.
But at least with this game, the enemy ai doesn't seem to have accuracy x 1000% as your moving in open areas. Most projectiles are easily dodge able. Unless you stand there and let them shoot you
Edit: I'm talking about the Bungie Halo's. Not the crap 343 are bringing out