Problem was found. Stratagus segfault if was started from Menu. If you start Wargus from xterm it works fine.

$ /usr/games/wargus

I do not know why Stratagus crashing. Now I'm sure that it is not caused by Maemo system (DBus registration).

Temporary solution is to start wargus from xterm.

EDIT: Problem is not caused by Maemo system. I thought that hildon-xxx kill stratagus due to some dbus problem, but it is not true. I attached debugger gdb to running stratagus process and I got SIGSEGV on function: int CPlayer::CheckLimits (file player.cpp line 565). No idea how to fix it