Missions that come with the game.
My friends and I realize the missions that come with these games are designed for the hard core FPS gamer. Some of them seem impossible to beat and fail to consider certain things like night time and sun glare seem to have no effect on the AI but only on the player. Some things that normally block a players vision may not always block the enemy AI vision. On the other hand sometimes a player can hide behind a tree and shoot through the leaves and the enemy won't see it coming. The trick of course is to learn what works and what doesn't and use it to your advantage. I've built missions where I've had AI enemy literally shoot me thorough a hilltop. There was no way for me to see or shoot them from where I was yet one of them was able to shoot me.
ARMA 1 is plagued with poor player visibility, some maps are worse than others and this gives the AI the advantage. Try to keep some of your AI men close to you so they can help be the eyes and ears.
ARMA 1 & 2 having AI positioned near you is a good idea because they can sometimes see and kill threats that you don't see fast enough. Having your men in position before enemy arrives gives you the advantage. Walking in on enemy that are all ready positioned leaves you at a disadvantage until you have distance from them and a good scope. Climbing to high ground or on top a building gives you a certain advantage until the enemy sees you! Be sure you have cover! Buildings that have little buildings on top that you can hide behind give you an advantage. Both games have the flaw of allowing AI units to literally walk through buildings walls and fences, sometimes they get trapped there. Sometimes you think you have cover only to have an enemy AI unit walk through the wall behind you and kill you. Doing the impossible is something AI units are great at but the players aren't. Both games if you take your AI soldiers near water they will go swimming, lose all their weapons and sometimes drown. Let's face it the AI is also kinda stupid.
ARMA 2: TWS is nice on a map that allows you to see the buildings land and trees as well as the hot targets. Not all maps allow you to see thermal well no mater what time of night you set the clock for. Some maps work quit well. Utes map doesn't work well with TWS but does fine with NV.
AddOns!
I'm a HUGE fan of most of the addons I've tried. The simple missions I'm posting here first should not require an addon but I assure you most of my missions do. In the event you try one of my missions that gives an error that it can't be played because of downloadable content you can go to
ARMAhaulics website and get the addon. I'll do my best to warn you when I know one of my missions uses addons but I sometimes forget. Eventually as I get time I'll post messages about addons that work that I like and the ones that I don't like.