System18

General Information

System18 is a format for 18xx microgames. Playtest Feedback Thread (BGG)

It is up to the map designer to provide rule differences from the base System18 rules.
System18 is expected to be published with two rulesets: Full Capitalization Rules and Incremental Capitalization Rules. These are currently unpublished, but the implementations are generally close to 18Chesapeake and 18Texas. A list of rules differences will be provided later.
Game End: Bankruptcy (full capitalization rules), one player remains (incremental capitalization rules), Complete one full set of operating rounds after the final phase has begun (full and incremental capitalization rules)
1846 rules for dealing with bankrupt players' companies if it does not end the game

Northeast US (Scott Petersen)

France (Scott Petersen)

UK Limited (Scott Petersen)

Full capitalization rules
Remove tiles 12-13, 205-206
Only trains of the current phase can be purchased from the bank (the “limited” aspect of this map)
If no train is available from the bank or bank pool, the corporation is relieved of its need to own a train at the end of its turn.
At the end of each OR (and as the last step of completing an OR), remove from the game all the unpurchased new trains of the current phase on offer from the bank (except don’t do this for the unlimited D-trains). The phase changes to the next phase as if a train of that next phase was already purchased.
Game end: Bankruptcy or complete two full OR sets after Phase D is activated

Twisting Tracks (Scott Petersen)

Full capitalization rules
Use new 5-train and 6-train (revised rusting)
Add new D trains in phases Pink, Purple, Orange, Navy
Add tiles X1-X6, 2× 59
Remove tiles 1-2, 7-9, 12-13, 23-29, 39-47, 53, 55-56, 61, 69, 205-206
[NEW RULE TO IMPLEMENT] Each corporation has three extra "ticket counters." When a company's home hex is upgraded to a 14/15/619 tile, the company that upgrades it must immediately place a ticket counter in that hex as their station marker placement. Ticket counters may be placed in the same hex as a company’s own station marker. Ticket counters may also be placed following the rules for placing station markers for $25. Ticket Counters function like tokens (including blocking other companies), but each route can only pass through ONE of the company's own ticket counters. Ticket counters can be bypassed if there is an open slot in the city or if the city contains the company's own token.

China Rapid Development (Scott Petersen)

Incremental capitalization rules
Add tiles X1-X9
Remove tiles 12-13, 53, 61, 205-206
Corporation value increases one space for each town or city tile company lays/upgrades (may lay 2 yellows or upgrade 1)
Corporation must pay half their current market value for each build that contains a town or city (rounded up, move price after each build)
If the corporation does not build, its value goes down one space
There is no stock price movement for revenue