Sorvice can be best described as a mix of an action game and an RPG, and utilizes a card system for spells.
Unused Graphics#
Early Title Screen Variants#
Three unused variations for the game's title screen can be found within the game's data.
The first one is located at CITY\ALPHA2.BIN, and is dated November 6, 1997, a whole ten months before the game's release. It seemingly came from an "Alpha 2" build.

The second one is located at BIN\TITLE_B1.BIN, and is dated December 29, 1997. "B1" could stand for "Beta 1". A "Press Start" graphic that matches this title screen design can also be found in the folder BIN, labeled as PUSH.BIN. It is dated December 9, 1997.

The third one is located at TITLE\TITLE.BIN, and is dated March 1, 1998. While it looks much more polished compared to the previous two designs, even having a copyright label, the game would use a completely different design (TITLE\NT.BIN). Accompanying sprites can also be found in the folder TITLE, labeled as PRESS.BIN, dated February 11, 1998.

(Source: tikal.)
Unused Backgrounds#
Of the backgrounds in the folder CITY, two of them are not called by any of the executables: those are CITY.BIN and MAINST.BIN, which depict urban areas. Strangely, MAINST.BIN is much smaller in height compared to the other backgrounds.

(Source: tikal.)
Unused UI Backgrounds#
Many early renditions for the game's UI backgrounds can be found within the disc image, uncalled by any of the executables.
BIN\SPR\FREM1.BIN / BIN\SPR\FREM2.BIN
Early, more detailed designs for the game's text boxes.
CATALOG\CATAROG2.BIN / RUNE_MIX\MIX2.BIN
Early versions of the card viewer.
CATALOG\CTX.BIN
An early version of the main Rune Catalog screen.
HOLDER\HOLD2.BIN
An early version of the RuneStock viewer.
TREAD\RUNE.BIN
An early version of one of the card trading screens.
TREAD\VS.BIN
(Source: tikal.)
Miscellaneous#
BIN\STAR.BIN
A very tiny circle, perhaps meant to be used for an effect.
BIN\SPR\HOLDER_K.BIN / BIN\SPR\HOLDER_W.BIN
Perhaps meant to be seen with the more detailed text boxes. A similar graphic to HOLDER_K.BIN can be seen in the game's file selection menu.
BIN\SPR\PUCKMAN.BIN
Pac-Man. It is the oldest file in the disc, being dated October 22, 1997.
BIN\SPR\WAKU.BIN / CATALOG\WAKU.BIN
A frame of unknown purpose.
CITY\WAKU2.BIN
Another frame of unknown purpose.
RUNE_MIX\BAR.BIN
A bar of unknown purpose.
TREAD\BAR.BIN
Another bar of unknown purpose.
(Source: tikal.)
Hidden Staff Roll#
BIN\SPR\STAFF.TXT contains a hidden staff roll.
SORVICE(ソルヴァイス)スタッフ
企画・発案
久富 卓
プログラム
岡本 利昭
小松 秀慎
タイトル
久富 卓
2Dエフェクト
久富 卓
高橋 亜紀
ムービーエフェクト
田部井 伸弥
オープニングムービー
田部井 伸弥
背景
久富 卓
高橋 亜紀
キャラクター原案
久富 卓
高橋 亜紀
キャラクター設定
高橋 亜紀
田部井 伸弥
キャラクターモデル
久富 卓
田部井 伸弥
キャラクターモーション
田部井 伸弥
モンスター原案
高橋 亜紀
田部井 伸弥
モンスターモデル
久富 卓
高橋 亜紀
田部井 伸弥
モンスターモーション
久富 卓
田部井 伸弥
取扱い説明書
木立 己百花
Special Thanks
江上 由子
須賀 正隆
小野 裕市
高島 大輔
高橋 晃太郎
安部 隆太郎
菊地 雅矢
(Source: Sega Retro)