It's repetitive, you have to play it in small chunks, certainly, but it's a fantastic game.
The second one. The devs weren't allowed to make the sequel a sandbox, the publisher stepped in, they wanted to make a linear shooter that would appeal more to morons/console gamers as the first one didn't sell great.
They had a great multiplayer lined up too and had to drop it, replace it with the crap we got.
The second game was a weak game but it was totally saved by it's combat, it's the only thing they were allowed to do so they concentrated on making it great, the enemies dart about and flank you and it's challenging and exciting.
guerilla, excellent game
armageddon, average game with good combat. Also the second game has the ludicrously low fov of 45, a third party hack fixed it but I think since it was patched it no longer works, so I can't recommend it to anyone.