I have a couple of suggestions for new modifiers and variables for game schemes.

(Feel free to add your suggestions for new modifiers in this thread.)

First some suggestions for game modifiers (things you can turn on or off, represented by the big buttons in the game scheme editor):

• Activate hog selection for free once at start of each turn
• Explosions don't push projectiles (1)
• Enable snow: Snow piles up (like in "Snow" theme). If this is disabled, snow is only decorative. Enabled by default.
• Long-lived flames: “Hot” flames (those that don't go immediately out at the end of the turn) only interact and shrink smaller between turns, and not based on real time (see also here: http://www.hedgewars.org/node/5959)
• No jumping (2)
• Fall damage: Hedgehogs take fall damage if enabled. If disabled, hedgehogs don't take fall damage. (enabled by default)
• No pain, no gain: Taking damage doesn't end turn (but death still does)
• Heavy hedgehogs: Hedgehogs are pushed much less by forces (explosions, brute force like shoryuken, wind if “more wind” setting is active). (3)
• Strategic tools: Girders, rubber bands, dirt balls, land sprays and resurrections end your turn (using them counts as an “attack”) (see also: http://www.hedgewars.org/node/5948)
• Crate spy: The contents of weapon and utility crates are written above all crates and can be seen by everyone

Footnotes:
1: The fact that explosions push other projectiles was introduced in one of the past Hedgewars versions. This made the melon bomb extremely unpredictable. This flag should disable this behavior so that all projectiles are unaffected by any explosions, and thus also reverting the melon bomb to the old (and more predictable) behaviour.

2: In fact, "No jumping" already has a script. However, scripts cannot be easily be combined, so it is simpler to have direct engine support for all of these options.

3: This makes it more difficult to push hedgehogs into the water.

Secondly, I suggest these new game variables to be changeable for game schemes (those where you can set numbers):

• Initial barrel health
• Sticky mine timer
• Time you get with Extra Time
• Extra damage you get with Extra Damage (in percent, relative to normal damage with respect to the main damage percentage, so default would be 150%, I guess. Note this modifier goes ON TOP of the overall damage)
• Percentage of health gained with Vampirism (% from damage dealt)
• Flying saucer fuel (also allow infinite fuel)
• RC plane rockets
• RC plane fuel (also allow infinite fuel)
• Number of eggs per Birdy

Of course, all within reasonable bounds.

Lastly, I suggest to weaken some of the restrictions imposed by the game scheme editor:

• Initial health should allow to enter 1 as minimum and 1000 as maxium
• Sudden Death damage should go up to 1000 either
• So should health crate contents