If you're having trouble reaching a specific secret area due to difficulty, you can use these official IGN PC Cheats :
The genius of the secret placement in Reloaded lies in its exploitation of the isometric perspective. Many of the best secrets are tucked behind foreground architecture or inside seemingly solid walls that lack collision data. Early levels, such as the initial laboratory breach, set the tone by hiding powerful shotguns and health kits behind flickering computer consoles or inside crates tucked into darkened corners. A seasoned player knows that every wall is a potential door; hugging the perimeter of every room is not just a defensive tactic, but a systematic search pattern for hidden rooms. alien shooter 2 reloaded all secret place top