Merc Command was a developing project for an iso RTS freelance sci-fi game.
The game is still at pre-alpha stage, and only a few aspects have been realized.
Unfortunately due to lack of time and motivation, I've ceased working on the project.
I'm still keeping it here as a demonstration of what Game Maker can do.
Graphics were done using POV-Ray.
You can see a screenshot below, to get an example.

Or you can download a demo version of the pre-alpha stage. Demo v0.0.5, Size 1.83 Mb.

Demo features (version 0.0.5 pre-alpha):

• Mouse Orders, Mouse Scroll
• 1 Vehicle, 2 FX
• Basic Commands (Move, Attack)
• Select Waypoints
• Drag - Select
• Pathfinding, upgraded
• Unit self-defence AI
• Patrolling
• Utility graphics & new background.
• Mini map.
• Basic GUI.

Prospective Features for next version:

• AI refinement.
• Database support.

Prospective Features for further version:

• Units, buildings, backgrounds, terrain, gfx and sfx.