I wouldn't say this was an "in-game agreement", but rather a pre-game setting.

Doesn't look like this is wildly popular, but I figure I'll bump it once just to convince myself that I tried my best

It shouldn't be too hard to code up, but it might be difficult to test and find the optimal threshold turn number.

Concise description:
I propose a hybrid game type which begins like a standard flat-rate game. After a set amount of turns, the set values change from flat-rate values to escalating values to discourage defensive standoffs.

Specifics:

⋅ Proposed game type name: Looking for ...

Congrats waseemalim!

Game 3151411

2008-09-21 16:55:13 - geigerm eliminated Risky_Stud from the game
2008-11-14 15:36:10 - geigerm eliminated taxmanjle from the game
2008-11-20 16:49:32 - geigerm eliminated prismsaber from the game
2008-11-30 12:12:44 - supersleuth eliminated mtc500 from the game
2008-12-01 14:13:29 ...