Based off of one of my old games, Alien War has quite a good battle system which includes:
-AI.
-Custom Heroes.
-Tested a lot for bugs.
::Update V1.1::
-Better terrain.
-3 other Marine Heroes to choose from.
-Balanced classes.
-Marine shop. (Upgrade Ammo)
-A lot more to come in V1.2
::Update V1.2::
-Wasn't good enough for a re-release.
::Update V1.3::
-Custom Icons.
-Fixed an animation bug with the Commanders "Plasma Grenade" that makes it just explode.
-Changed the ability "Plasma Grenade" to "Air Strike" (NOTE: Still includes effects and original damage.
::Update V1.4::
-Added custom Alien model made by AlienAntFarm.
-Has been tested by a friend.
(Drizzt-Urden)
-Added custom guns so that the HWT has a more realistic weapon. Weapons were made by General Frank.
-Changed the marines model into a model that allowed me to attack the guns. (Made by TalonTheMage)
-Changed the damage to fit with attack rate.
-Changed required XP to level from 1 to 2 to 800, and set max hero level to 3 to fit in with ability levels.
::Update v1.5::
-Added custom Loading Screen Preview image.
-Fixed the EXP problems.
-Added custom colour to the text, such as names, abilities etc.
-Played around with the armor and damage a bit, and now it is basically balanced.
::Update v1.6::
-Added custom icons.
-Added "FaceHuggers" and "ChestBursters" to the Aliens, which is a pretty good thing for the Aliens.
-Fixed the damage YET again to compensate for the FaceHugger addition.
-The new FaceHugger unit has a custom skin AND model made by me.
-I am thinking about adding other hero classes to the Aliens. It is basically going to be like a "if you are x color, then you are x Alien Type, so there will be only one of each.
-Also thinking of adding a little "buy an ability" thing for the Marines, like if you buy a Needle, you get a one charge ability called "Inject" which heals a selected ally.
::Update V1.7::
-I have added a new hero to the Alien ranks called the Alien Brute. Look out marines, this one is a tough. Thats about it!
PLEASE READ!
I am looking for people who wish to help me with Alien Wars. If you want to help, contact me via The Hive and I will get back to you. If you help, you will immediately be put as one of the Co-Creators, but that is only if you add something worthwhile, like a new class, not just edit an ability.