Play Half-Life with friends! Players fight computer-controlled monsters through the original Half-Life storyline or hundreds of available co-operative scenarios. Also includes a plethora of new weapons, enemies, visuals and gameplay systems. Customization features allow each map to use its own unique weapons and enemies.
Screenshots of gameplay in Sven Co-op.
Just use Gauss so you can take care of the apache. -.-
The idea isn't to rush things but to have fun. I think it's a lot more fun messing around and shooting down the helicopter this way. You have to remember that not everyone want to rush the game.
Yeah this, this is why I don't go to pub servers anymore, it's always 2 or 3 guys speedrunning the map and getting mad at the others for not being so fast.