(Haste rune) You: after firing BFG, you can not fire anything for 3 seconds.
(Electric Rune) OPP: If you have enviro suit, you can go for a swim and zap players under water.
(Kamakazi) OPP: Columns, platforms, and lifts will shield you. Although you did mention enviro rune as a counter in another section, you should mention it here as well. Most people will not read this guide front to back, so each rune section should contain all of it's counters.
(Death spot) OPP: pick up vengenance and pent and send your opponent into oblivion every 10 seconds.
(Hologram) You: Color matching is only visible in non-GL clients. GL-clients see a gold pant, brown shirt figure. Strategy: match your colors to the GL colors and have some fun!
(Uncontrollable jumping) You: A player with the flight rune is forced to the ceiling.
(Rune of health) You: Although your maximum is set to 666, Mega Health boxes will bump your health up to 150 more health point above 666 (or for that matter any rune's max).
(Shield) You: when activated acts like the enviro rune against all traps. (Not for sure if it protects you against hook though)
(Switch rune) You: There is a distance limitation on switch. If you are trying to switch with someone far away, you will see blue particles appear between you and your opponent. Switching with Shambies is very effective. An undamaged dhamby holds 400 health. If you have red armor and switch with a shamby, now you have RA and 400 health! OPP: can be avoided with enviro.
(Gravity rune) You: Your projecticles and shots are not attracted to it. OPP: If your opponent lays one of these in a busy room. spam grenades at it. Grenades fly around the well and cause havoc for all players in its vicinity. Wells do not effect you until you are within about 25 (virtual feet) of it.
(Teleport) OPP: get the anti-telefrag rune and stand still with a shit eating grin.
(Impact) You: very effective at keeping a pent owner away.
(Vengenace) Zop you need to add that when they carry quad and this rune it returns 4X damage back when you are hit. (Just a clarification)
(Shambler rune) You: After your shamby is covered in timebombs and your opponent is ready to send it back to you, drop the rune and it leaves all of his own time bombs ticking away right in front of him. OPP: after killing shamby player, the best way to kill the shambler is quad/strength/bezerk and lighting gun.
(Weird rune) YOU: If you find your opponent has zombies blocking your path, you can weird out the zombies and they will eventually jump out of your way. Same goes for shamby, but it seems useless against the shamby since his perfect aim is unaffected.
(Bezerk rune) You: Can you say pent? OPP: shield works great against this type of player.
(Hougan rune) Repulsion, impact, and gravity moves these zombies with ease.
(Zen rune) It is important to note that when a zen user is not "tranced" he is 100% vulnerable to shells, nails & cells. GL & RL are either random or require a direct hit (not for sure).
(Fire rune) I have taken out very healthy players with this rune. Hook on and throw traps at them. There is no delay between how often you can throw a trap so you can effectively use it as a weapon.
(Glue traps) Although I do not agree with this, it is important to note that you can get caught in your own trap while still bearing the rune. Only death spots and tornados work in this fashion.
(Blizzard rune) Even if you are charged up and ready to freeze, if you accidentally bump into someone, you lose your charge.
(Snipe rune) OPP: Extremly dangerous if the user owns pent.
(Anti-pak rune) Note: This will stop a player from bfging if he picks up mid charge.
(Tornado rune) You do not always gain 50 cells when picked up. I'm not
for sure what the cutoff is, but I know after 60 cells it gives you nothing.
These are my additions. I talked to Slot about making an Official Rune Guide about 6 months ago, except I wanted to incorporate pictures into the guide. I think you have created all of the verbage necessary and that the addition of pictures would make this a very niece guide. Making it into a HTML document with tables is my vision. I am still up to making this more elaborate guide that I speak of, but I need another player to join me at a server to take screenshots.
Examples would be screen shots of a person frozen, on fire, tornado, spike on head, vengenance head, etc.
I have already taken screen shots of everything that I can do by myself, Ice traps, weird balls, fire traps, switch particles, etc., but that's only half of what is really needed.