Wyrmsun, the free and open source retro-looking RTS just had a sizeable update with some great new stuff included. The game uses a modified version of the old Stratagus engine which has itself been in development since sometime in 1998.
A little more about it:
Wyrmsun is an open-source real-time strategy game which features elements of mythology, history and fiction.
In the Wyrmsun universe a myriad of inhabited planets exist. Humans dwell on Earth, while dwarves inhabit Nidavellir and elves nourish the world of Alfheim. These peoples struggle to carve a place for themselves with their tools of stone, bronze and iron. And perhaps one day they will meet one another, beyond the stars...
It's a very retro RTS, with it feeling familiar to old Warcraft titles and other RTS games released around that time. With that in mind, it won't be for everyone but I think it's great. There's multiple races, story-based scenarios, units earn experience and level up, a persistent hero feature and much more.
Release highlights for 3.4.0:
- Playable Norse civilization
- Addition of Mason's Shop buildings for non-dwarven civilizations
- Inclusion of Ballista/Catapult Tower buildings
- New experience upgrades for some dwarven units