Does anybody even still has editing power over the list? The creator has been seen last active 2 years ago and the list has not been updated for quite some time I think. Perhaps it is time to make a new free games list for bay12.
Anyway here is
Zero-K, a free, multiplatform, open-source RTS, where massive robot armies fight each other.
Featuring: over 100 unique units with extreme diversity, epic battles at each scale, realistic physics that for example affect the bullet trajectory, deep tactical and strategical decisions with dynamic counterplay, factionless flat techtree - every factory (and with them every unit) and building is accessible at the start of the game and only a cost of the unit matters, lots of tiresome micro removed - one does not have to baby sit their units and factories in order them to function well (as in many other RTS's) or units can be ordered in a line instead of points, and many other exiting features that would make this post look like a wall of text. I hope that got you interested.
Ps. Yes I know I have like 2 posts on this forum but I am just one of the lurkers that particularly like to observe the "other games" part of it and this was actually a place that I have learned about the game I mentionedm but for whatever reason it was removed from the list.