XCOM: Chimera Squad
... that Sid Meier prototyped the interleaved turns system in XCOM: Chimera Squad using a game engine that he had developed over a period of around twenty years?
... that <a href="./Sid_Meier" id="mwAQ4" rel="mw:WikiLink" title="Sid Meier">Sid Meier</a> prototyped the interleaved turns system in <i id="mwAQ8"><b id="mwARA"><a href="./XCOM:_Chimera_Squad" id="mwARE" rel="mw:WikiLink" title="XCOM: Chimera Squad">XCOM: Chimera Squad</a></b></i> using a <a href="./Game_engine" id="mwARI" rel="mw:WikiLink" title="Game engine">game engine</a> that he had developed over a period of around twenty years?