The game has already been completely completed (except for the adventure mode - it has not been touched).

Content update v1.10.103 Operation Guns.

1 big stage and 1 bonus stage;
11 new characters;
22 new types of weapons between basic and improved versions;
6 new music tracks;
13 music tracks taken straight from the Contra series, and 6 completely new covers;
A new adventure of 6 chapters.
Path:

For pirated version: C:\Users\username\AppData\Roaming\Goldberg SteamEmu Saves\1794680\remote.
For Steam version: C:\Steam\userdata\859233627\1794680\remote.

Author: MAD_CRAZY_MAX