Any of the following rules/mods can be taken alone, or lumped together. Or, of course, altered until unrecognizable from the original.
1. City States
Probably the most important for making two-player play a bit less unbalanced. After picking your colors, take a third color (we always used black) and assign at least one random territory in each continent as an independent city state. We generally put one each in Australia and S. America, two in N. America, Africa and Europe and three in Asia. Each city state gets 10 units. They are not reinforced unless attacked; after any attack on a city state that doesn't wipe it out, add one unit of partisans. After a player attacks a city state for the first time, it will then get a one die standard attack roll against all adjacent territories in which you have units. If that roll wipes out the last player unit, the territory becomes annexed to the city state with 5 units.
The city state rules make it hard to both attack the human opponent, defend against him/her and try to wipe out a whole continent. When combined with the alternate reinforcement rules below, it makes the game take a LOT LONGER, but allows for some very different strategic planning. Including deliberate pestering of city states near your opponents main areas and deliberately losing to them in order to create new annexes. Heh.
2. Alternate Reinforcements
We dumped the regular reinforcement rules even in 3+ person play. Way too much swinging back-and-forth with huge swings based on the cards. Three main changes:
- Regular reinforcements = territories owned divided by two when it's your turn and divided by three when it's anybody else's. Yes, you get reinforcements when it's not your turn. Attacker deploys reinforcements first. Again, this makes for a longer and more defensive game.
- Continents' value adjusted up by +3 for each. This has the effect of making the smaller continents more valuable relatively.
- Cards reinforcements: turn over a random card each turn. That territory gets +3 reinforcements. If playing with City States, they don't get them. We basically hated how important random card matching and hording became in later game stages.
This is a weird one, but we had fun with it. At the beginning of the game, take a 2nd color for your navies. You use the big (x10) pieces as carrier groups and get 3 of them. You use the little ones as destroyers and get 10. They can start on the coast of any territory you have. You can move them once per turn to the coast of an adjacent territory. Carrier groups can transport up to 10 troops each and can shell adjacent territories based on two-times the number of troops carried. Carrier groups defend, however, as only one unit, plus any destroyers in the same "sea territory." Carrier groups cannot attack other sea units. So while they are powerful, they are vulnerable. You can't have more than 3 carrier groups and 10 destroyers (we defended this idea based on fuel availability, but we were pre-teens, so whatever) at any time, but if they are destroyed, you can trade regular units in any territory adjacent to sea at the rate of 3 units per destroyer and 10 per carrier group. This makes your original carrier groups relatively valuable and encourages irrational expansionism that often comes up short. You're welcome.
At any time you can trade 20 units in one territory for a nuclear missile with defensive strength of zero. There is a three turn count-down, during which if the nuke is destroyed, it goes away. On the third turn after it was created, it can be used to either: a) wipe out all enemy (or city state) units in one territory, anywhere in the world (or all sea units in one sea territory), or; b) halt all enemy reinforcements (offensive and defensive), worldwide, for the next two attacking turns. This was the "EMP" version of the attack, and we thought ourselves very clever.
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We tried some rules for air units (fighters and bombers) similar to the navy rule, but that got too complicated... At some point, you can just hang up Risk and play Tactics II or Panzer Blitz or something. We also tried some rules that prevented massive, multi-turn build ups of forces based on the idea that the populace would eventually not like huge standing armies hanging out for multiple years. But that required turn counters and... bleh.
Anyway. I just realized today that I had never chronicled these most excellent mods, and the Internet is where I'm supposed to put this stuff so that the group mind can benefit.