The Collaborative International Dictionary of English v.0.48:

Alife \A*life"\, adv. [Cf. lief dear.]
   On my life; dearly. [Obs.] "I love that sport alife." --Beau.
   & Fl.
   [1913 Webster]

The Free On-line Dictionary of Computing (30 December 2018):

alife

   artificial life