Jagged Alliance 2. Mod 1.13 changed a lot last year, and I'm still fuming that my mercs are like stormtroopers...6 people shooting at one guy, and NOT ONE hits?
I mostly am into the TellTale game series. Including game of thrones and borderlands. I was also playing Jagged Alliance Flashback. I remember playing Jagged Alliance 2 all the time, I usually played as a single merc using guerrilla war tactics, and night raids. I could easily beat the game without any addition mercs.