If they HAVE to, they can use their syringe gun or bonesaw.But having a decent healing target who defends you is more effective.
I could never figure out how to use engineer
on my first time, I was spy and kept getting killed because of cigarettet spychecks, then i was engie and got killed because i didnt do cigarettet spychecks.I was scout and got killed by pyro, I was demo and got killed by pyroI was pyro and killed everything in sight.I was sniper and got 8 kills within the first 10-20 seconds of the round and got an achievement.
I'd have to say I'm alot better at sniper and pyro than anything else. My top class picks are prolly Sniper and Spy.I love the Tribalman's Shiv + Jarate when ya got a fgt tyring to close combat kill you.
The first time I played I sucked, too. Tf2 was one of the hardest fps games to grasp for me, but when I got better it was a lot more fun to play.