Press SHIFT+~, type :
            BIGCHEATER for god mode
            FLY for fly mode
            NOCLIP for no clipping mode (walk-thru-walls)

            Press SHIFT+~ to exit that screen.

            Take No Prisoners - Full version cheats

            Press Shift-~ to bring up the console and type:

            juggernaut - God mode
            goldblum - Fly mode
            wraith - No clipping mode
            positions - Show your position (x,y,z)
            a_moveme x,y,z - Move to the given coordinates
            dir maps - List available maps
            map x - Warp to map X (X=Level name)
            spawn x - Create an item or creature
            ode to jack - Kill all creatures on level

            Items:

            w_saber
            w_assault_rifle
            w_crossbow
            w_laser_rifle
            w_gauss_gun
            w_grenade_launcher
            w_rocket_launcher
            w_flame_thrower
            w_chain_gun
            w_plasma_generator
            w_ptp_cannon
            i_medical_kit
            i_flak_jacket
            i_body_armor
            i_reflectarmor
            i_heatshield
            i_energyarmor
            i_energyshield
            i_molotov
            i_gas_gren
            i_claymore
            i_float_disk
            i_rocket_net
            i_gas_mask
            i_laser_sight
            i_disk
            i_enhancers
            i_shuriken
            i_implosion
            i_fragger
            i_radshield
            i_ir_goggles
            i_stealth
            i_grav_belt
            i_force_barrier
            i_override
            i_flare
            i_demopack
            i_energyshield
            i_dome_device
            i_dome_crystal

            Take no Prisoners (Demo) - Hints

            Oh you can cheat madly. Just drop to the console sometime and have a
            blast... just watch out for what variables you modify; they might
            have unpredictable (and possibly undesirable) results, and the
            console's not technically "under warranty" so to speak. But it's
            there nonetheless. Use it at your own risk. Most of the
            commands/variables aren't truly dangerous (they can just have wacky
            results inside the game), but if it looks important it probably is.

            If you type impulse followed by a number from the console, different
            things can happen. For example, "impulse 76" automagically uses your
            medkit. If you have enough patience or creativity, you might be able
            to find something tasty that way....