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README for xsoldier $Id: README,v 1.9 2011/08/09 08:12:25 oohara Exp $ * what is xsoldier xsoldier is a shoot 'em up game with the "not shooting" bonus. It is 2D (that is, hardware acceleration is not necessary if you have a "not bad" CPU) game for one player using the X Window System or the Simple DirectMedia Layer (SDL) library. So, why yet another shoot 'em up? Because xsoldier has a unique feature --- the "not shooting" bonus. You can get a pretty good score by not pressing the shoot button. This is an answer to my motto for a shoot 'em up, that is, "why a shoot button?". After all, if the game is a simple kill-everything and shooting is always a good thing, why do I have to press a shoot button (or worse, hit the shoot button again and again)? You can play xsoldier as a simple kill-everything (and it is the best way to survive), but if you care your score, you need to kill all enemies with a minimum number of bullets. * how to install xsoldier See the file INSTALL for information about how to install xsoldier. In short, install libc, libX11 and libXpm, then type 1) ./configure 2) make 3) make install If you use SDL instead of X, install libSDL and libSDL_image instead of libX11 and libXpm, then use the --with-sdl option of ./configure . * overview of the game In xsoldier, you move a space ship and shoot enemies (they usually appear from the upper side of the window, but some appear from the _lower_ side). If you kill the boss enemy which appears at the end of each stage, or if you can survive till the boss enemy gets bored with you and escapes, you can go to the next stage. xsoldier has 8 stages. You need to clear each stage 3 times to clear the entire game (24 stages total). A set of the 8 stages is called a "loop". If you cleared the first loop (that is, the first 8 stages), the second loop will begin after the ending (a staff scroll), with more difficulty (enemies shoot more, enemy shots move faster and so on). Similarly, the third loop will begin after the second loop (and the second ending). The third loop is very dangerous because enemies will _always_ leave a shot when they die. * command line options ** (-d | -display) NAME Specify the (X window) display on which you want to play the game. ** (-w | -wait) NUMBER Set the speed of the game. A higher number means the game runs slower. NUMBER must be a positive integer. If you use this option and if NUMBER is greater than the default (use -h to see it), the ranking mode is turned off. ** (-c | -cmap) This option has no effect (only for backward compatibility). ** (-s | -score) Show the top 10 soldiers, that is, the high score list. ** (-h | -help) Show a short help text and exit. ** -maxlevel Force max level enemy attack, making your life really harder. ** -nopausemessage Don't show "Press [p] to resume game." message when the game is paused. This is useful for capturing a screen snapshot. If you compiled xsoldier with debugging features, the follwing options are also available. They disable the ranking mode. ** -stage L-S Start the game with the stage S of the loop L. S must be a positive integer between 1 and 8, and L must be a positive integer between 1 and 3. ** -stage S Start the game with the stage S. S must be a positive integer between 1 and 8, ** -loop L Start the game with the loop L. L must be a positive integer between 1 and 3. ** -ship N Start the game with N ships. N must be a integer between 0 and 99. ** -maxpower Make sure that you always have a maximum power weapon. * key control cursor keys move left shift shoot (auto-repeat) a speed up s speed down p pause/resume q quit the game space start the game (in the title/ending) You can use a joystick too if xsoldier is compiled with joystick support (see INSTALL). Note that joystick support is no longer maintained. Probably it won't work on a system other than Linux. If you compiled xsoldier with debug features, some keys are also available for cheating: w change weapon c clear enemy shots * power-up items Some enemies sometimes leave a power-up item when they die (others never do). There are 2 kinds of items. The one which says "Pow" makes your shots more powerful. The other one (which changes its appearance periodically) changes your weapon and makes your shots a bit more powerful. There are 3 kinds of weapons you can use --- blue, yellow and gray. The blue shot is fast, damages fairly well and you can shoot it backward if you correct enough power-up items. The yellow shot shoots many, many bullets, so you don't need to aim very carefully. However, each bullet deals only a little damage. The gray shot is slow and you can shoot it only forward, but it damages very well (even boss enemies will die in a few seconds). If you already have enough power-up items and gets another one, it will give you bonus points. If you die, you may lose some of power-up items. * "not shooting" bonus You get a bonus automatically as long as you don't press the shoot key (to be precise, if it is at least 5 frames after you released the shoot key). This bonus is called "not shooting" bonus. The more enemy there are in the window, the more points you get. Enemy shots, power-up items and explosions also count as enemies for the "not shooting" bonus. * shoot down bonus When you clear a stage by destroying the boss enemy, you get a bonus according to the percentage of enemies you destroyed in this stage. 95% destroy bonus is 1/2 of 100% destroy bonus, 90% destroy bonus is 1/3 of of 100% destroy bonus and so on. The shoot down bonus is larger in later stages. * game tips Your ship is smaller than it looks. In other words, your ship will not be destroyed even if enemy shots touch it a bit. The yellow shot is the best way to survive. Keep pressing the shoot key unless you are an expert. Problems are that your score will be poor and that the yellow shot is not good at killing the boss enemies. Play with the boss enemies for a while to get the "not shooting" bonus. stage estimated bonus difficulty 1 small easy 2 small very easy (loop 1), hard (loop 2 or later) 3 small hard 4 medium normal (loop 1 or 2), hard (loop 3) 5 very big easy (loop 1), normal (loop 2 or later) 6 big hard 7 small hard 8 very big very hard Make sure that you destroy the boss enemies before they escape. Don't miss the shoot down bonus. * feedback Send comments or bug reports to Oohara Yuuma <oohara@libra.interq.or.jp>. Also check the xsoldier webpage: http://www.interq.or.jp/libra/oohara/xsoldier/index.html * license See the file LICENSE for information about the license. In short, the license is GPL version 2 or later. * history The original author of xsoldier was Yuusuke HASHIMOTO <hachi@pm.highway.ne.jp>. He maintained xsoldier until version 0.96. It was a simple but decent shoot 'em up. The original xsoldier webpage was http://www.surfline.ne.jp/hachi/xsoldier.html . Oohara Yuuma <oohara@libra.interq.or.jp> took over the development of xsoldier and added the "not shooting" bonus. The game bacame easy if you are interested in just surviving.
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