Output of ‘file’ command on cataclysm executable:
cataclysm: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=c8cab0ae6369d23c11da4dd68577b7625f7ee321, stripped
It’s a 32bit executable.