Operation flashpoint to name one. It came out in 2001 IIRC and is still played.
About the big ships. I personally haven't seen them either. Apart from one time when I saw a miracle. HMS Hood and HMS Nelson sailing without escorts.
I was lucky since they were coming right at me. And well what would a real Kaleun do? He wouldn't miss... unlike me. I thought the Hood is more important and shot a salvo of 3 torpedoes at it. The sea was calm and the weather clear but they all missed... until Nelson sailed right behind Hood and took all of them near the engine compartments!

It came to a complete halt and pitched to the left side quite heavily. I tried firing my torp at hood again but it evaded

Well since it was sailing at 28knots I didn't chase it and just waited for Nelson to sink... which it didn't. After wasting about 4 torpedoes as duds premature's and other failures I finally sunk it and only got 2 eels left. That was my only encounter with the big ships and I'm happy it all went as good as it did