Here are some gems I've found recently:
- ASCII Sector, a remake of the classic Wing Commander Privateer
- The surprisingly action-packed Doom RL;
- Legerdemain (
- And the hardest strategy game ever, Dwarf Fortress (now with a new unofficial tileset and experimental 3-D visualizer that may prevent some eye-bleeding).
Classic, complex Rogue-like RPGs continue to go strong, too.
Those interested in exploring further should peruse this list of the best new releases from ASCII dreams.