We reconsider the issue of embedding space-time fermions into the four-dime
nsional N = 2 worldsheet supersymmetric string. A new heterotic theory is c
onstructed, taking the right-movers from the N = 4 topological extension of
the conventional N = 2 string but a c = 0 conformal field theory supportin
g target-space supersymmetry for the left-moving sector. The global bosonic
symmetry of the full formalism proves to be U (1, 1), just as in the usual
N = 2 string. Quantization reveals a spectrum of only two physical states,
one boson and one fermion, which fall in a multiplet of (1, 0) supersymmet
ry. (C) 2001 Elsevier Science B.V. All rights reserved.