chocolate-common 2.2.1-2.1 (s390x binary) in ubuntu xenial

 Chocolate Doom aims to accurately reproduce the original DOS version of
 Doom and other games based on the Doom engine in a form that can be
 run on modern computers. Unlike most modern Doom engines, Chocolate Doom
 is not derived from the Boom source port and does not inherit its
 features (or bugs).
 .
 Originally, Chocolate Doom was only a Doom source port. The project
 now includes ports of Heretic and Hexen, and Strife.
 .
 This package contains the dedicated server for multiplayer games and
 the common configuration tool for all four ports.