int G_GotoPrevLevel(void)
{
    const int cur_epsd = gameepisode;
    const int cur_map = gamemap;
    const int start_epsd = (gamemode == commercial) ? 1 : 9;
    int ret = false;

    for (gameepisode = start_epsd; gameepisode > 0; gameepisode--)
    {
        for (gamemap = 99; gamemap >= 0; gamemap--)
        {
            int next_epsd, next_map;
            G_GotoNextLevel(&next_epsd, &next_map);

            if (next_epsd == cur_epsd && next_map == cur_map)
            {
                G_DeferedInitNew(gameskill, gameepisode, gamemap);
                ret = true;
                break;
            }
        }
    }

    gameepisode = cur_epsd;
    gamemap = cur_map;

    return ret;
}