Bridge Construction Set
It's awesome.
Or Lugaru, also awesome.
Neither are FPSs, mind, but damn good fun.
(
Paper 'n Pencil Thirst is excellent, even better than I hoped,
Sat 12 Apr 2008, 19:53,
archived)
Errrr! *google*
(
Ttssattsr,
Sat 12 Apr 2008, 19:56,
archived)