ZDoom

Or, as an alternative, expose some new function APlayerPawn :: ResetInventoryToDefault that calls ClearInventory and then GiveDefaultInventory.

It may have the following use cases:

1. Strip player of all the weapons inside the map.
Map designers will be able to create single-level "get into and escape the prison" scenarios, instead of separating scenario in two levels and using property "ResetInventory" in MAPINFO/Map definition.

2. Force pistol start.
Gameplay mod designers will have straightforward way to reset player inventory at level start.

3. Punishing/replacing pickup.
With GiveDefaultInventory, it will be possible to create a pickup that takes away all player possessions and gives some other thing instead.

I second this.

First, I just realized that this thread is a duplicate of this: ResetInventory
It's funny because I actually used a solution posted there.

Second, I made some modifications to that solution. Changes are:
1. Armor and health are also reset.
2. Instead of taking all the weapons, all inventory is cleared.
3. After setting weapons, first start weapon is selected.
With these changes I managed to make pistol start script work properly for Trailblazer and DUMP3 weapons.