This is an idea from an adaptation myself and some friends made to a board game. Cant remember what it was called- lol!
Description:
Every x rounds (say 10 rounds) each player gains a nuclear bomb, which they can use when they feel like it.
The bomb can only be targetted to a territory the player has a spoil for.
The impact of the bomb is calculated by a dice roll (or maybe 2 dice). Therefore, an opponent can lose up to 6 (or 12 dice).
There was also fallout - I think it was 2 per connected territory. Although, there was always at least one survivor.
Benefits:
Exciting gameplay. Less build-up games.
Just an idea - would help in build-up games (i.e. x=40 for example). This idea would probably need some considerable tweaking.
It could perhaps be an option when starting a game?