Losing in Gigalomania
Gigalomania [blog] is an open source 2D Real Time Strategy game, for Windows, Mac OS X, Linux, and Nokia smartphones (Symbian, Maemo and Meego). The gameplay consists of researching and developing new technology with which to conquer your enemies, from rocks and sticks to nuclear weapons and spaceships. You can advance through ten different ages, from the stone age to the future. There are 28 different maps to play through.
CTruck3D is a simple-looking OpenGL truck simulator.
There is an ASCII-Art variant called term_CTruck3D.
EDIT: What's quite interesting about the game is the marketing(?). Two YouTube accounts seem to be quite excited about the game: simhgamedev and violinperforming.