Open the "outcast.ini" file in the game directory with any text editor and edit the following lines under the indicated headings:
All items cost 10
[WeaponMerchant]
m_simple_ammo=10.000000
m_tracer_ammo=10.000000
m_flame_ammo=10.000000
m_boom_ammo=10.000000
m_dart_ammo=10.000000
m_perf_ammo=10.000000
m_holo=10.000000
m_dynamite=10.000000
m_o2=10.000000
m_trip=10.000000
m_health=10.000000
m_invis=10.000000
m_teleport=10.000000
m_detonate=10.000000
m_scope=10.000000
m_tracer=10.000000
m_perf=10.000000
m_flame_up=10.000000
m_dart=10.000000
m_tracer_up=10.000000
m_boom=10.000000
m_simple_up=10.000000
m_laser=10.000000
m_flame=10.000000
m_simple=10.000000
m_boom_up=10.000000
Always find 999 in money and health
[Bonuses]
MoneyChest=999.000000
Money=999.000000
Life=999.000000
First gun has fast bullets
[SimpleGun]
Weight_of_bullet=0.010000
Speed_of_bullet_min=300.000000
Speed_of_bullet_max=400.000000
Reloadtime_of_bullet=20000
Lifetime_of_bullet=20000
Friction_of_bullet=0.000000
First gun does more damage
[SimpleGun]
Damage=399.000000
Burst_Size_Level_3=24
Burst_Size_Level_2=12
Burst_Size_Level_1=20
BulletRadius=10.000000
Each ammunition box contains 999 bullets
[SimpleGun]
AmmoBox=999.000000
Invincibility
[Human]
HeroDamageScale=0.000000000
Lower resources for ammunition
[Recreators]
rec_simple=1*GREEN_HERIDIUM+1*METAL
rec_cooker=4*RED_HERIDIUM+4*GREEN_HERIDIUM