gameconqueror: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/gameconqueror - from package: gameconqueror

You may install the required package with command apt-get install {package}

Error in other languages:
gameconqueror: bevel nie gevind nie
gameconqueror: comandă negăsită
gameconqueror: comando não encontrado
gameconqueror: commande introuvable
gameconqueror: command not found
gameconqueror: käsku ei ole
gameconqueror: không tìm thấy lệnh
gameconqueror: komanda nerasta
gameconqueror: Kommando nicht gefunden.
gameconqueror: kommandot finns inte
gameconqueror: komut yok
gameconqueror: nie znaleziono polecenia
gameconqueror: níor aimsíodh an t-ordú
gameconqueror: no se encontró la orden
gameconqueror: no s'ha trobat l'ordre
gameconqueror: opdracht niet gevonden
gameconqueror: parancs nem található
gameconqueror: perintah tidak ditemukan
gameconqueror: príkaz nenájdený
gameconqueror: příkaz nenalezen
gameconqueror: команда не найдена
gameconqueror: командата не е открита
gameconqueror: 命令找不到
gameconqueror: コマンドが見つかりません